Colorblindness Does Not Automatically Disqualify You From Driving
Most colorblind people can drive legally. The vast majority of U.S. states do not require normal color vision to hold a driver's license. You will not fail your vision test at the DMV because you cannot distinguish red from green. However, some states do test color vision in specific situations — usually when a medical professional reports a vision problem, or when you renew after a medical event — and a few occupational licenses (commercial driving, for instance) have stricter rules than regular driving.
The reason colorblindness is not a blanket barrier is practical: colorblind drivers can still see traffic lights because they rely on position and brightness, not color alone. Red lights are at the top, green at the bottom. A colorblind person sees the brightness change and the location. The same logic applies to most road signs — shape and text matter more than color.
What matters to your state's DMV is whether you can see well enough to read signs, judge distance, and detect movement. That is what the standard vision screening tests. Color perception is separate, and most states do not screen for it during routine renewals.
Key Takeaways
- Colorblindness alone will not cause you to fail a DMV vision test or lose your regular driver's license in most states.
- Traffic lights work by position and brightness, not color, so colorblind drivers can navigate them safely.
- A few states test color vision only when a doctor reports a vision problem or after certain medical events.
- Commercial driver's licenses and some specialized permits have stricter color vision rules than regular licenses.
- If you are colorblind and your state does test for it, you can still drive — the test determines whether you meet that state's specific standard, not whether colorblindness exists.
Which States Test Color Vision and When
No state requires a color vision test as part of a routine license renewal or initial issuance for regular driving. However, some states include color vision screening when you renew after reporting a medical condition, or when a healthcare provider submits a report about your vision to the DMV.
States that do conduct color vision tests typically use the Ishihara test (colored dot plates) or the Farnsworth D-15 test (arranging colored caps). These tests measure the degree of color vision loss, not whether you are colorblind in absolute terms. A person with mild or moderate color blindness may pass; someone with severe color blindness may not. The threshold varies by state and by the type of driving license you hold.
If your state does test and you do not pass, you will not automatically lose your license. Instead, the DMV will usually require a functional driving evaluation — a behind-the-wheel assessment by a certified specialist — to determine whether your actual driving ability is safe. Many people who do not pass a color vision test still pass the functional evaluation and retain their license.
Commercial Driving and Specialized Licenses
Commercial driver's licenses (CDLs) have stricter vision rules than regular licenses. The Federal Motor Carrier Safety Administration (FMCSA) requires commercial drivers to pass a color vision test as part of the medical certification process. This is a federal standard, so it applies across all states.
If you hold a CDL or are seeking one, you will need to see a certified medical examiner who will administer a color vision test. Failing that test does not automatically disqualify you from a CDL — you may be able to obtain a waiver or exemption depending on your specific situation and your state's rules. Some states allow a functional driving evaluation in place of the color test for commercial drivers.
School bus drivers, hazmat endorsement holders, and other specialized commercial roles may have additional vision requirements. Check with your state's commercial driver licensing office for the exact rules that explore to the endorsement you seek.
What Happens During a DMV Color Vision Test
If your state does test color vision, the examiner will show you a series of colored dot plates (usually the Ishihara test) and ask you to identify numbers or patterns within them. The test takes a few minutes. You will be asked to read the plates under standard lighting conditions.
The test does not measure whether you are colorblind — it measures how well you can distinguish colors. Results fall into categories: normal color vision, mild color blindness, moderate color blindness, or severe color blindness. Your state's DMV has a threshold for each type of license. If your result falls below that threshold, you may be referred for a functional driving evaluation or asked to provide additional medical documentation.
Bring any glasses or contact lenses you normally wear while driving. The test is conducted with your corrected vision, just like the rest of the DMV eye exam.
Functional Driving Evaluations After a Failed Color Test
A functional driving evaluation is a real-world driving test conducted by a certified occupational therapist or driving rehabilitation specialist. It is not the same as your standard road test. The evaluator will observe you driving in various conditions — daylight, dusk, different road types — and assess whether you can safely navigate traffic signals, read signs, and respond to road hazards.
The evaluation typically lasts one to two hours and costs between $300 and $600, depending on your state and the evaluator. Some insurance plans cover it; others do not. If you fail the color vision test and your state requires an evaluation, ask the DMV whether they maintain a list of approved evaluators or whether you can choose your own.
Many people who fail the color vision test pass the functional evaluation. The evaluation is designed to measure actual driving safety, not color perception in isolation. If you pass, you will retain or receive your license. If you do not pass, the evaluator will provide recommendations — sometimes a restricted license (daylight driving only, for example) or a requirement to retake the evaluation after a set period.
Reporting a Medical Condition to Your State DMV
If you have been diagnosed with a new vision problem — including progressive color blindness, macular degeneration, or diabetic retinopathy — your eye doctor may be required to report it to your state's DMV. Some states have mandatory reporting laws; others do not. Ask your eye care provider whether they are required to report your condition.
If a report is filed, the DMV will contact you and may ask you to undergo additional testing, including a color vision test. This does not mean you will lose your license. It means the state wants to verify that your vision is still safe for driving. Respond to the DMV's request promptly and provide any medical documentation they ask for.
If you know your vision has changed and you are concerned about your safety, you can contact your state's DMV directly and request a vision retest before renewal. This is voluntary and can help you understand whether your condition affects your driving before the state initiates contact.
What to Do If You Fail a Color Vision Test
If you fail a color vision test at the DMV, you will receive a notice explaining what happens next. Read it carefully — it will tell you whether you need a functional driving evaluation, whether you can appeal the result, or whether you have the option to retake the test.
Do not assume the result means you cannot drive. Many states allow you to request a functional evaluation or a second opinion from your own eye care provider. Some states allow you to retake the color vision test after a waiting period. Ask the DMV what options are available in your state.
If you are required to have a functional evaluation, schedule it as soon as possible. Bring your regular glasses or contacts, and drive in the conditions you normally encounter (if the evaluator allows it). Be honest about any concerns you have about your own driving safety — the evaluation is designed to protect you and others on the road, not to punish you for a medical condition.
Frequently Asked Questions
Will I fail my driver's license test if I'm colorblind?
No. The standard DMV vision test does not screen for colorblindness. You will be tested on visual acuity (how clearly you see), peripheral vision, and ability to see at night — not color perception. Most colorblind people pass the DMV vision test without any problem.
Can I drive at night if I'm colorblind?
Yes. Colorblindness does not affect your ability to see in low light or to distinguish the brightness of traffic lights. If your state does test color vision and you do not pass, you may be restricted to daylight driving, but that is a separate decision based on a functional evaluation, not an automatic consequence of colorblindness.
Do I have to tell the DMV I'm colorblind?
No. Colorblindness is not a medical condition you are required to report to the DMV. If an eye doctor diagnoses a progressive vision problem that happens to involve color perception, that may trigger a report depending on your state's laws, but straightforward colorblindness does not.
What if I fail the color vision test but want to keep driving?
Request a functional driving evaluation. This is a real-world driving test that measures whether you can actually drive safely, not just whether you pass a color test. Many people who fail the color test pass the functional evaluation and retain their license.
Does colorblindness affect my ability to get a commercial driver's license?
It may. Commercial drivers must pass a color vision test as part of federal medical certification. If you do not pass, you can request a waiver or exemption in some states, or you may be able to take a functional driving evaluation instead. Contact your state's commercial driver licensing office for the rules that explore to you.