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United States Window Tinting Laws

This guide is a reference provided by Knox County Window Tint, is not to be used as legal advice and may not reflect any recent changes made to each individual state laws regarding window tinting. Please refer to your local laws and regulations for window tinting in your area before application. Knox County Window Tint is not responsible for any inaccuracies in information provided. Knox County Window Tint is not associated in anyway with the websites listed below or approve of any information on these sites.
 

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U.S. Window Tinting Laws

WA
NH
ME
MT
ND
VT
OR
MN
ID
MA
SD
NY
WI
RI
WY
MI
CT
IA
PA
NE
NJ
NV
IL
OH
IN
DE
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CO
WV
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CA
KS
VA
MO
KY
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AZ
OK
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AR
SC
GA
MS
AL
TX
LA
AK
FL
HI

(AL) Alabama Window Tinting Laws

The vehicles windows must not be darker than 32% VLT with the exception of multi-purpose vehicles from which the windows behind the driver are darkened from the manufacturer. Film applied may not be more than 20% reflectivity. Windshields are allowed a strip no more than 6 inches from the top of windshield.
Color restrictions: None stated.
Measurement Tolerance: 3%
Medical Exemptions: Yes​
Alabama 32-5c-1 - 32-5c-7
Source: http://alisondb.legislature.state.al.us/alison/codeofalabama/1975/coatoc.htm
 

(AK) Alaska Window Tinting Laws

The vehicles driver and passenger door windows must not be darker than 70% VLT and all other windows behind the driver and passenger must not be darker than 40% VLT. Windshields are allowed a strip no more than 5 inches from the top of the windshield.
Color Restrictions: Tint applied must be green, grey, bronze, or neutral smoke in color. 
Measurement Tolerance: 3%
Medical Exemptions: Yes
Alaska 13 AAC 04.233
Source: http://www.legis.state.ak.us/basis/aac.asp#13.04.223

(AZ) Arizona Window Tinting Laws

The vehicles driver and passenger door windows must not be darker than 33% VLT with no more than 35% reflectivity. All windows behind the driver and passenger are allowed tinting as long as it does not have more than 35% reflectivity. Tint is allowed on the top of the windshield as long as the bottom edge of the material is at least twenty-nine inches above the undepressed driver’s seat when measured from a point five inches in front of the bottom of the backrest with the driver’s seat in its rearmost and lowermost position with the vehicle on a level surface.
Color Restrictions: Red and amber.
Measurement Tolerance: 3%
Medical Exemptions: Yes
Arizona 28-959.01
Source: http://www.azleg.state.az.us/ars/28/00959-01.htm

(AR) Arkansas Window Tinting Laws

On all 1994 or later model vehicles, the driver and passenger door windows and rear door windows, must not have darker than 25% VLT with no darker than 10% VLT on the rearmost window only. Multi purpose vehicles may have no darker than 10% VLT on any windows behind the driver and passenger side windows. The Windshields may have a strip of tint no larger than 5 inches from the top center part of windshield.
Color Restrictions: None stated.
Measurement Tolerance: Unclear
Medical Exemptions: Yes
Arkansas 27-37-306
Source: http://policy.mofcom.gov.cn/GlobalLaw/english/flaw!fetch.action?id=bc26ea4e-a8e1-4e09-b3c6-ff788ac9f852&pager.pageNo=1#arkansas-title-27-subtitle-3-chapter-37-subchapter-3-27-37-306 

(CA) California Window Tinting Laws

The vehicles driver and passenger door windows are allowed a clear and colorless film that is no darker than 88% VLT. Tint is allowed on the top of the windshield as long as the bottom edge of the material is at least twenty-nine inches above the undepressed driver’s seat when measured from a point five inches in front of the bottom of the backrest with the driver’s seat in its rearmost and lowermost position with the vehicle on a level surface.
Color Restrictions: Red and amber.
Measurement Tolerance: Must not read darker than 70% with film applied to window.
Medical Exemptions: No

California 26708
Source: http://www.leginfo.ca.gov/cgi-bin/displaycode?section=veh&group=26001-27000&file=26700-26712
 

(CO) Colorado Window Tinting Laws

The vehicles driver and passenger window must not be darker than 70% VLT. Any window behind the driver is allowed tint that is no darker than 27% VLT. Windshields are allowed a strip no larger than 4 inches from the top center of the windshield and are not to be darker than 70% VLT.
Color Restrictions: Red and amber.
Measurement Tolerance: Unclear.
Medical Exemptions: No
Colorado 42-4-227revised
Source: https://archive.org/stream/govlawcocode20124243/govlawcocode20124243_djvu.txt

(CT) Connecticut Window Tinting Laws

The vehicles windows must not be darker than 35% VLT. Vehicles windows must not have a reflectivity more than 27% for the driver and passenger door windows and no more than 21% reflectivity for any window behind the driver. Windows located behind the driver on multi-purpose vehicles may have any tint as long as left and right outside mirrors reflect the drivers view of at least 200ft. behind vehicle. Tint is allowed on the top of the windshield as long as the bottom edge of the material is at least twenty-nine inches above the undepressed driver’s seat when measured from a point five inches in front of the bottom of the backrest with the driver’s seat in its rearmost and lowermost position with the vehicle on a level surface.
Color Restrictions: Red and amber
Measurement Tolerance: 3%
Medical Exemptions: Yes
Connecticut 14-99g
Source: https://www.cga.ct.gov/current/pub/chap_246.htm#sec_14-99g

(DE) Delaware Window Tinting Laws

All of the vehicles windows must meet the requirements of Federal Motor Safety Standard 205 in effect at the time of manufacture. Film is permitted on top of windshield as long as it does not exceed below the windshields  AS-1 marking and is transparent.
Color Restrictions: Unclear.
Measurement Tolerance: Unclear.
Medical Exemptions: Yes
Delaware 4313
Source: http://delcode.delaware.gov/title21/c043/sc01/index.shtml

(FL) Florida Window Tinting Laws

The vehicles driver and passenger door windows must not be darker than 28% VLT and has a reflectivity of no more than 25%. The windows behind the driver most not be darker than 15% VLT and has a reflectivity of no more than 35%. The windows behind the driver on multi-purpose vehicles must not be darker than 6% VLT. Film is permitted on top of windshield as long as it does not exceed below the windshields  AS-1 marking and is transparent.
Color Restrictions: None stated.
Measurement Tolerance: 3%
Medical Exemptions: Yes
Florida 316.2951-316.2957
Source: https://www.flsenate.gov/Laws/Statutes/2011/Chapter316/All

(GA) Georgia Window Tinting Laws

The vehicles windows must not be darker than 32% VLT and has a reflectivity of no more than 20%. Windshields may have a strip that is no larger than 6 inches from the top of the windshield and is transparent. The windows behind the driver on a multi-purpose vehicle are exempt from these provisions.
Color Restrictions: Red and amber.
Measurement Tolerance: 3%
Medical Exemptions: Yes
Georgia 40-8-73.1
Source: http://policy.mofcom.gov.cn/english/flaw!fetch.action?id=1130bb6b-7c8e-45b9-8222-373f0a1df619&pager.pageNo=1#georgia-title-40-chapter-8-article-1-part-4-40-8-73-1

(HI) Hawaii Window Tinting Laws

The vehicles driver and passenger door windows and the side windows behind the driver must not be darker than 35%. The rearmost window must meet the requirements of the Federal Motor Vehicle Safety Standard 205 in effect at time of manufacture. The windshield may have a strip that does not exceed below the windshields AS-1 mark or 4 inches from the top center of the windshield in the case of no AS-1 mark.
Color Restrictions: None stated.
Measurement Tolerance: 6% 
Medical Exemptions: None Stated.
Hawaii 291-21.5
Source: http://www.capitol.hawaii.gov/hrscurrent/vol05_ch0261-0319/hrs0291/hrs_0291-0021_0005.htm

(ID) Idaho Window Tinting Laws

The vehicles driver and passenger door windows must not be darker than 35% VLT and has a reflectivity of no more than 35%. The windows behind the driver must not be darker than 20% VLT and has a reflectivity of no more than 35%. The windshield is allowed a strip no larger than 6 inches from the top center of the windshield.
Color Restrictions: None stated.
Measurement Tolerance: 3%
Medical Exemptions: Yes 
Idaho 49-944
Source: https://legislature.idaho.gov/idstat/Title49/T49CH9SECT49-944.htm 

(IL) Illinois Window Tinting Laws

If the vehicles windows behind the driver allow less than 30% VLT the driver and passenger windows are allowed no darker than 50% VLT. If the vehicles windows behind the driver allow less than 35% VLT the driver and passenger windows are allowed no darker than 35% VLT. If the vehicles windows behind the driver are smoked by manufacturer then the driver and passenger windows are allowed no darker than 50% VLT. The windshield is allowed a strip no larger than 6 inches from the top center of the windshield.
Color Restrictions: None stated.
Measurement Tolerance: 5%
Medical Exemptions: Yes
Illinois 625 ILCS 5/12-503
Source: http://www.ilga.gov/legislation/ilcs/fulltext.asp?DocName=062500050K12-503 

(IN) Indiana Window Tinting Laws

The vehicles windshield, driver and passenger door windows and rearmost window must not be darker than 30% VLT and has a reflectivity of no more than 25%. The law is unclear about side door windows behind driver.
Color restrictions: None stated.
Measurement Tolerance: Unclear
Medical Exemptions: Yes 
Indiana 9-19-19-4
Source: http://policy.mofcom.gov.cn/english/flaw!fetch.action?id=76ef3f1e-9ebd-4eb0-8066-50b275e7a8c5 

(IA) Iowa Window Tinting Laws

Restrictions too vague.
Color restrictions: None stated.
Measurement Tolerance: Unclear
Medical Exemptions: None stated.
Iowa 321.438
Source: https://coolice.legis.iowa.gov/Cool-ICE/default.asp?category=billinfo&service=IowaCode&ga=83&input=321.438 

(KS) Kansas Window Tinting Laws

The vehicles windows must not be darker than 35% VLT. The windshield may have a strip that does not exceed below the windshields AS-1 mark.
Color restrictions: Red, yellow and amber.
Measurement Tolerance: None stated.
Medical Exemptions: None Stated.
Kansas 8-179a
Source: http://www.ksrevisor.org/statutes/chapters/ch08/008_017_0049a.html

(KY) Kentucky Window Tinting Laws

The vehicles driver and passenger door windows must not be darker than 35% VLT and has a reflectivity of no more than 25%. The vehicles windows behind the driver must not be darker than 18% VLT and has a reflectivity of no more than 35%. The windows behind the driver of a multi-purpose vehicle are allowed no darker than 8% VLT. The windshield may have a strip that does not exceed below the windshields AS-1 mark. 
Color restrictions: None stated.
Measurement Tolerance: 3%
Medical Exemptions: None stated.
Kentucky 189.110
Source: http://www.lrc.ky.gov/statutes/statute.aspx?id=6309 

(LA) Louisiana Window Tinting Laws

The vehicles driver and passenger door windows must not be darker than 40% VLT. The vehicles door windows behind the driver must not be darker than 25% VLT. The vehicles rearmost window must not be darker than 12% VLT. All vehicle windows must have a reflectivity of no more than 20%. The windshield is allowed a strip no larger than 5 inches from the top center of the windshield.
Color restrictions: Red and amber.
Measurement Tolerance: Tolerance included in restrictions stated above
Medical Exemptions: None stated. 
Louisiana 32:361.1revised
Source: http://legis.la.gov/legis/Law.aspx?d=88294 

(ME) Maine Window Tinting Laws

The vehicles windows must not be darker than 35% VLT. The windshield may have a strip that does not exceed below the windshields AS-1 mark or 5 inches from the top center of windshield in case of no AS-1 mark. 
Color restrictions: None stated.
Measurement Tolerance: None stated.
Medical Exemptions: Yes
Maine 29-a, 1916revised
Source: http://www.mainelegislature.org/legis/statutes/29-A/title29-Asec1916.html

(MD) Maryland Window Tinting Laws

The vehicles windows must not be darker than 35% VLT. The windshield may have a strip that does not exceed below the windshields AS-1 mark or 5 inches from the top center of windshield in case of no AS-1 mark.
Color restrictions: None stated.
Measurement Tolerance: None stated.
Medical Exemptions: Yes
Maryland 22-406
Source: http://mgaleg.maryland.gov/webmga/frmStatutesText.aspx?article=gtr§ion=22-406&ext=html&session=2015RS&tab=subject5 

(MA) Massachusetts Window Tinting Laws

The vehicles windows must not be darker than 35% VLT and has a reflectivity of no more than 35%. The windshield is allowed a strip no larger than 6 inches from the top center of the windshield.
Color restrictions: None stated.
Measurement Tolerance: None stated.
Medical Exemptions: Yes
Massachusetts 90, 9D
Source: https://malegislature.gov/Laws/GeneralLaws/PartI/TitleXIV/Chapter90/Section9D 

(MI) Michigan Window Tinting Laws

Regulations on VLT are unclear. Film must not have a reflectivity more than 35%. The windshield can have a strip no larger than 4 inches from the top center of the windshield.
Color restrictions: None stated.
Measurement Tolerance: None stated.
Medical Exemptions: Yes
Michigan 257.709
Source: http://www.legislature.mi.gov/(S(dnn0qwrumijo4jxf4aukcrds))/mileg.aspx?page=getObject&objectName=mcl-257-709 

(MN) Minnesota Window Tinting Laws

The vehicles windows must not be darker than 50% VLT and has a reflectivity of no more than 20%.
Color restrictions: None stated.
Measurement Tolerance: 3%
Medical Exemptions: Yes
Minnesota 169.71
Source: https://www.revisor.mn.gov/statutes/?id=169.71 

(MS) Mississippi Window Tinting Laws

The vehicles windows must not be darker than 28% VLT. Reflectivity is not stated. Film in the uppermost area of windshield applied must meet requirements federal law has authorized to vehicle manufacturers.
Color restrictions: None stated.
Measurement Tolerance: None stated.
Medical Exemptions: Yes
Mississippi 63-7-59
Source: http://policy.mofcom.gov.cn/GlobalLaw/english/flaw!fetch.action?id=2ec9a571-f763-424c-b52b-07edc60c9bab&pager.pageNo=1#mississippi-title-63-7-63-7-59

(MO) Missouri Window Tinting Laws

The vehicles driver and passenger door windows must not be darker than 35% VLT and has a reflectivity of no more than 35%. Regulations for windshields and vehicle windows behind driver are not stated or unclear.
Color restrictions: None stated.
Measurement Tolerance: 3%
Medical Exemptions: Yes
Missouri 307.173.1revised
Source: http://www.moga.mo.gov/mostatutes/stathtml/30700001731.HTML 

(MT) Montana Window Tinting Laws

The vehicles driver and passenger door windows must not be darker than 24% VLT and has a reflectivity of no more than 35%. The vehicles windows behind the driver must not be darker than 14% VLT and has a reflectivity of no more than 35%. The windshield may have a strip that does not exceed below the windshields AS-1 mark.
Color restrictions: Red, yellow and amber.
Measurement Tolerance: None stated.
Medical Exemptions: Yes
Montana 61-9-405
Source: http://leg.mt.gov/bills/2013/mca/61/9/61-9-405.htm 

(NE) Nebraska Window Tinting Laws

The vehicles driver and passenger door windows must not be darker than 35% VLT and has a reflectivity of no more than 35%. The vehicles windows behind the driver must not be darker than 20% VLT and has a reflectivity of no more than 35%. The windshield may have a strip that does not exceed below the windshields AS-1 mark.
 
Color restrictions: Red, yellow and amber.
Measurement Tolerance: None stated.
Medical Exemptions: Yes
Nebraska 60-6, 257
Source: http://www.nebraskalegislature.gov/laws/statutes.php?statute=60-6,257

(NV) Nevada Window Tinting Laws

The vehicles driver and passenger door windows must not be darker than 35% VLT. Regulations for the windows behind driver are not stated or unclear. Tint is allowed on the top of the windshield as long as the bottom edge of the material is at least twenty-nine inches above the undepressed driver’s seat when measured from a point five inches in front of the bottom of the backrest with the driver’s seat in its rearmost and lowermost position with the vehicle on a level surface.
Color restrictions: Red and amber.
Measurement Tolerance: 7%
Medical Exemptions: Yes
Nevada 484D.440
Source: https://www.leg.state.nv.us/nrs/NRS-484D.html#NRS484DSec440

(NH) New Hampshire Window Tinting Laws

The windows behind the driver must not be darker than 35% VLT. Tinting on the windshield or driver and passenger door windows allowed to persons with a medical waiver permitting application.
Color restrictions: Red and amber.
Measurement Tolerance: 7%
Medical Exemptions: Yes
New Hampshire 266:58-a
Source: http://www.gencourt.state.nh.us/rsa/html/XXI/266/266-58-a.htm 

(NJ) New Jersey Window Tinting Laws

No film allowed on the windshield or the vehicles driver and passenger door windows. The vehicles windows behind the driver not stated or unclear. 
Color restrictions: None stated.
Measurement Tolerance: None stated.
Medical Exemptions: Yes
New Jersey 39:3-74
Source: http://policy.mofcom.gov.cn/english/flaw!fetch.action?id=c350e237-e842-4ffd-b3e2-4385c1e09848&pager.pageNo=1#new-jersey-title-39-section-39-3-39-3-74

(NM) New Mexico Window Tinting Laws

The vehicles windows must not be darker than 20% VLT. The windshield may have a strip that does not exceed below the windshields AS-1 mark or 5 inches which ever is closer to the top.
Color restrictions: Red, yellow and amber.
Measurement Tolerance: None stated.
Medical Exemptions: Yes
New Mexico 66-3-846.1
Source: http://policy.mofcom.gov.cn/english/flaw!fetch.action?id=4ea8e491-dbfa-48fd-967b-85923e635f86&pager.pageNo=1#new-mexico-chapter-66-article-3-section-66-3-846-1 

(NY) New York Window Tinting Laws

The upper 6 inches of windshield, side windows and rearmost window may not be covered with any material that is less than 70% VLT.
Color restrictions: None stated.
Measurement Tolerance: None stated.
Medical Exemptions: Yes
New York 375
Source: http://public.leginfo.state.ny.us/lawssrch.cgi?NVLWO:
 

(NC) North Carolina Window Tinting Laws

The vehicles windows must not be darker than 35% VLT and has a reflectivity of no more than 20%. The windshield may have a strip that does not exceed below the windshields AS-1 mark or 5 inches which ever longer.
 
Color restrictions: Red, yellow and amber.
Measurement Tolerance: 3%
Medical Exemptions: Yes

North Carolina 20-127
Source: http://www.ncleg.net/gascripts/statutes/statutelookup.pl?statute=20-127

(ND) North Dakota Window Tinting Laws

The vehicles windows must not be darker than 50% VLT. The windshield can not be darker than 70% VLT.
Color restrictions: None stated.
Measurement Tolerance: None stated.
Medical Exemptions: None stated.
North Dakota 39-21-39
Source: http://www.legis.nd.gov/cencode/t39c21.pdf#nameddest=39-21-39 

(OH) Ohio Window Tinting Laws

The vehicles windows must not be darker than 50% VLT. The windshield must not be darker than 70% VLT. The windshield may have a strip that does not exceed below the windshields AS-1 mark or 5 inches which ever is closer to the top.
 
Color restrictions: Red and yellow.
Measurement Tolerance: 3%
Medical Exemptions: Yes
Ohio 4501-41-03
Source: http://codes.ohio.gov/oac/4501-41-03 

(OK) Oklahoma Window Tinting Laws

The vehicle windows must not be darker than 25% VLT and has a reflectivity of no more than 25%. Vehicles manufactured prior to 1996 are allowed no darker than 10% VLT on windows behind driver as long as vehicle is equipped with two side mirrors giving driver vision of 200ft. behind vehicle. The windshield may have a strip that does not exceed below the windshields AS-1 mark or 5 inches which ever is closer to the top.
Color restrictions: Red and amber.
Measurement Tolerance: None stated.
Medical Exemptions: Yes 
Oklahoma 47-12-422
Source: http://oklegal.onenet.net/oklegal-cgi/get_statute?99/Title.47/47-12-422.html 

(OR) Oregon Window Tinting Laws

Tinting applied to side and rear windows of vehicle must not be darker than 50% VLT, has a reflectivity of no more than 13% and the window with the film applied is not darker than 35% VLT. The windshield is allowed a strip no larger than 6 inches from the top center of the windshield.
Color restrictions: Red, gold, yellow, amber and black.
Measurement Tolerance: None stated.
Medical Exemptions: Yes
Oregon 815.221
Source: http://www.oregonlaws.org/ors/815.221

(PA) Pennsylvania Window Tinting Laws

Law is vague or unclear.
Color restrictions: None stated.
Measurement Tolerance: None stated.
Medical Exemptions: Yes
Pennsylvania 4524
Source: http://www.legis.state.pa.us/cfdocs/legis/LI/consCheck.cfm?txtType=HTM&ttl=75&div=0&chpt=45&sctn=24&subsctn=0 

(RI) Rhode Island Window Tinting Laws

The vehicles side windows and rear most window must not be darker than 70% VLT. The windshield is allowed a strip no larger than 6 inches from the top center of the windshield. 
Color restrictions: None stated.
Measurement Tolerance: None stated.
Medical Exemptions: None stated.
Rhode Island 31-23.3-4
Source: http://webserver.rilin.state.ri.us/statutes/title31/31%2D23.3/31%2D23.3%2D4.htm

(SC) South Carolina Window Tinting Laws

The vehicles windows must not be darker than 27% VLT with window and film applied together. The windshield may have a strip that does not exceed below the windshields AS-1 mark. If no AS-1 mark then no film is allowed on windshield.
Color restrictions: None stated.
Measurement Tolerance: None
Medical Exemptions: Yes
South Carolina 56-5-5015
Source: http://www.scstatehouse.gov/code/t56c005.php 

(SD) South Dakota Window Tinting Laws

The vehicles driver and passenger door windows must not be darker than 35% VLT. The vehicle windows behind driver must not be darker than 20% VLT. The windshield may have a strip that does not exceed below the windshields AS-1 mark.
Color restrictions: None stated.
Measurement Tolerance: 9%
Medical Exemptions: None stated.
South Dakota 32-15-2.4 through 32-15-2.7
Source: http://sdlegislature.gov/Statutes/Codified_Laws/DisplayStatute.aspx?Type=Statute&Statute=32-15 

(TN) Tennessee Window Tinting Laws

The vehicles windows must not be darker than 35% VLT. The vehicles windshield must not be darker than 70% VLT.
Color restrictions: None stated.
Measurement Tolerance: None stated.
Medical Exemptions: Yes
Tennessee 55-9-107
Source: https://www.tn.gov/lawsandpolicies/article/55-9-107.-motor-vehicle-windows-with-tinting-reflecting-or-sun-screen-mater 

(TX) Texas Window Tinting Laws

The vehicles driver and passenger door windows must not be darker than 25% VLT and has a reflectivity of no more than 25%. The vehicles windows behind the driver may have any tint as long as the vehicle is equipped with two outside mirrors that give the driver a vision of at least 200ft. behind vehicle. The windshield may have a strip that does not exceed below the windshields AS-1 mark or 5 inches which ever is closer to the top.
 
Color restrictions: Red, blue and amber.
Measurement Tolerance: 3%
Medical Exemptions: Yes
Texas 547.613
Source: http://www.statutes.legis.state.tx.us/Docs/TN/htm/TN.547.htm

(UT) Utah Window Tinting Laws


The vehicles driver and passenger door windows must not be darker than 43% VLT. The vehicles windows behind the driver may have any tint. The windshield may have a strip that does not exceed below the windshields AS-1 mark or 4 inches which ever is lowest. 
Color restrictions: None stated.
Measurement Tolerance: None stated.
Medical Exemptions: None stated.
Utah 41-6a-1635
Source: http://le.utah.gov/xcode/Title41/Chapter6a/41-6a-S1635.html 

(VT) Vermont Window Tinting Laws

Vehicles may not have any obstructions on windshield or driver and passenger door windows. The vehicles windows behind the driver may have any tint as long as the vehicle is equipped with two outside mirrors that give the driver a vision of at least 200ft. behind vehicle.
Color restrictions: None stated.
Measurement Tolerance: None stated.
Medical Exemptions: Yes
Vermont 1125 
Source: http://legislature.vermont.gov/statutes/section/23/013/01125 

(VA) Virginia Window Tinting Laws

The vehicles driver and passenger door windows must not be darker than 50% VLT and has a reflectivity of no more than 20%. The vehicles windows behind the driver must not be darker than 35% VLT and has a reflectivity of no more than 20%. No darkening film may be applied to the windshield. 
Color restrictions: None stated.
Measurement Tolerance: None stated.
Medical Exemptions: Yes
Virginia 46.2-1052
Source: https://vacode.org/2016/46.2/III/10/6/46.2-1052/ 

(WA) Washington Window Tinting Laws

The vehicles windows must not be darker than 24% VLT and has a reflectivity of no more than 35%. The windshield may have a strip that does not exceed below the windshields AS-1 mark or 6 inches.
Color restrictions: Red, gold, yellow and black.
Measurement Tolerance: None stated.
Medical Exemptions: Yes
Washington 46.37.430
Source: http://app.leg.wa.gov/rcw/default.aspx?cite=46.37.430 

(WV) West Virginia Window Tinting Laws

The vehicles side door windows must not be darker than 35% VLT and has a reflectivity of no more than 20%. The vehicles rearmost window may have any tint as long as the vehicle is equipped with two outside mirrors that give the driver a vision of at least 200ft. behind vehicle. The windshield may have a strip that does not exceed below the windshields AS-1 mark or 5 inches which ever is closer to the top. 
Color restrictions: Red, yellow and amber.
Measurement Tolerance: None stated.
Medical Exemptions: Yes 
West Virginia 17C-15-36a
Source: http://www.legis.state.wv.us/wvcode/ChapterEntire.cfm?chap=17c&art=15§ion=36A 

(WI) Wisconsin Window Tinting Laws

The vehicles driver and passenger door windows must not be darker than 50% VLT. The vehicles windows behind driver must not be darker than 35% VLT. The windshield may have a strip that does not exceed below the windshields AS-1 mark.
 
Color restrictions: None stated.
Measurement Tolerance: 3%
Medical Exemptions: Yes
Wisconsin 305.32 and 305.34
Source: https://docs.legis.wisconsin.gov/code/admin_code/trans/305/II/32

(WY) Wyoming Window Tinting Laws


The vehicles windows must not be darker than 28% VLT and has a reflectivity of no more than 20%. The windshield may have a strip that does not exceed below the windshields AS-1 mark or 5 inches which ever is closer to the top.
Color restrictions: Red, yellow and amber.
Measurement Tolerance: None stated.
Medical Exemptions: Yes
Wyoming 31-5-962
Source: http://law.justia.com/codes/wyoming/2011/title31/chapter5/section31-5-962