Color Vision Requirements by Profession: Pilots, Drivers, Military, Rail and More

Last updated: July 2026. This is a plain-language guide, not legal or medical advice. Color vision standards change and vary by country, so always confirm the current rule with the relevant authority or employer.

Why some jobs test your color vision

In many safety-critical jobs you have to tell colors apart quickly and correctly: a red signal from a green one, a live wire from an earth wire, a navigation light on a ship. For these roles, normal color vision is a genuine job requirement, not discrimination. Around 1 in 12 men and 1 in 200 women have some form of color vision deficiency (CVD), usually red-green, so it comes up often in hiring and training.

Two things are worth understanding up front:

  • A screening test tells you whether you likely have a deficiency. A certification or fitness decision is made by an approved test under controlled conditions, usually by a professional. They are not the same thing.
  • A free online test like ours is a screening tool, not a diagnosis and not an official job test. It is a useful first check so you are not surprised later, but no online, printed, or downloaded test counts for an official medical. You can check your own color vision here in a couple of minutes, then get properly tested if it flags anything.

Aviation and pilots

Aviation has the strictest color vision rules, and this is the one area where the traditional Ishihara plate test is being retired at the top end.

  • United States (FAA), pilots: As of 1 January 2025, new pilot applicants must pass an approved computerized color vision test taken in person: the CAD test, the Rabin Cone Contrast Test, or the Waggoner Computerized Color Vision Test. The FAA no longer accepts Ishihara plates for new unrestricted certification, and it does not accept online, printed, or downloaded tests. Pilots already certificated under the old rules are generally grandfathered.
  • US air traffic control specialists (ATCS): Interestingly, controllers are treated differently. The FAA still accepts traditional plate tests for ATCS, including Ishihara, Richmond-HRR, Dvorine, Titmus and OPTEC, alongside the computerized options.
  • Europe (EASA), UK (CAA), and ICAO countries: Most of the world still uses the Ishihara plate test as the first-line screen, with the CAD test as the definitive follow-up if you do not pass the plates. Canada and Australia follow a similar screen-then-confirm model.

Bottom line for pilots: color vision deficiency does not automatically end an aviation career, but the exact path depends heavily on your country and the severity of your deficiency. A free screen is a sensible first step before you book an aeromedical exam.

Commercial driving (CDL, HGV) and standard licences

  • United States (CDL): Federal rules require a commercial driver to recognize and distinguish among traffic signals and devices showing standard red, green, and amber. The medical examiner checks this functional ability. It is about being able to read signals safely, not about passing a specific branded plate test.
  • United Kingdom and European Union: There is generally no color vision requirement for an ordinary or a standard commercial driving licence. The emphasis is on visual acuity and field of vision.

Bottom line for drivers: for most everyday and commercial driving, color vision deficiency is not a barrier, as long as you can reliably tell traffic signals apart.

Rail

Rail is one of the clearest cases, because signalling depends on reading colored aspects (red, yellow, green).

  • United Kingdom: Safety-critical rail roles require good color vision. The Ishihara plate test is the first-line screen, and a computerized test such as CAD is increasingly used as a second-tier check for people who do not pass the plates, so borderline candidates get a fairer assessment.
  • European Union: Train driver medical standards name the Ishihara test for the initial color vision check.
  • United States: Federal rail rules require adequate color vision for signal-dependent duties, with plate testing plus, in some cases, a practical field test of the signals themselves.

Bottom line for rail: color vision matters a lot, but a modern second-tier test can requalify some people who fail the plates.

Maritime

Mariners and deck officers have to identify navigation lights, buoys and signal flags, so international rules require color vision for these roles.

  • Under the international STCW standard, color vision is assessed using recognized methods, with the Ishihara test as the common first-line screen. Where someone does not pass, a lantern test (such as the Holmes-Wright) or a modern computerized test may be used to confirm fitness.

Bottom line for maritime: deck and navigation roles need color vision, but engine-room and some other roles have different requirements, so check the specific standard for the job.

Military and law enforcement

  • US military: The Ishihara plate test is still the primary recruitment screen across the branches. Computerized cone contrast tests (the Rabin Cone Contrast Test, CAD, and the Waggoner test) are used as a secondary or grading test, especially for aircrew, and they are replacing the older Farnsworth Lantern (FALANT), which is being phased out. Color vision deficiency rarely blocks enlistment outright, but it can limit which military occupational specialties you can hold.
  • UK and other militaries: A similar model applies, with an Ishihara screen and a lantern or CAD test as the definitive check for color-critical roles.
  • Police and public safety: Many agencies set color vision standards for officers, often screened with plate tests as part of a broader pre-employment battery.

Bottom line for military and law enforcement: a deficiency usually narrows your options rather than closing the door completely, and how your result is recorded can matter, so it is worth knowing where you stand before you apply.

Electrical and skilled trades

Electricians and many skilled trades rely on color-coded wiring (for example live, neutral and earth) and color-coded components. Getting these wrong is a genuine safety risk. Color vision is not always a formal pass-or-fail test in these trades, but it is a real competency and safety consideration, and some apprenticeship programs screen for it early so any issue is known before someone is working on site.

Other fields

Color vision can also matter for electronics assembly, some laboratory and medical roles, printing and design, and emergency services. The requirement is usually specific to the task rather than a blanket rule, so if color is central to the work, expect it to be assessed.

What to do if you think you might be colorblind

  1. Screen yourself first. Take a free color vision test under good, natural lighting on a decent screen. It will not diagnose you, but it will tell you whether it is worth looking into.
  2. Learn the type. If it flags something, our guide to the types of color vision deficiency explains protan, deutan and tritan in plain language.
  3. Get properly tested. For any job decision, book a proper test with an eye-care professional or the employer's approved provider, under controlled conditions. Results can vary with lighting, screen quality and whether you wear correction, which is exactly why an official test is done in person.

Remember: a screening result is a starting point, not a verdict. Many people with a mild deficiency still qualify for roles they assumed were closed to them.

Frequently asked questions

Can you be a pilot if you are colorblind? Often yes, depending on severity and country. In the US, new pilots must pass an approved computerized test as of January 2025; elsewhere an Ishihara screen with a CAD follow-up is common.

Can you get a CDL if you are colorblind? In the US, you must be able to distinguish red, green and amber traffic signals. Many people with mild deficiency meet this.

Can you join the military if you are colorblind? Usually yes, but it can limit which specialties you can hold. The Ishihara test is still the standard recruitment screen.

Does color blindness show up on a normal eye test? Not always. A standard acuity test does not check color vision, so you can have 20/20 vision and still be colorblind.

Can color blindness be cured or corrected? Inherited color vision deficiency cannot be cured. Some tinted lenses can improve contrast for certain people, but they do not restore normal color vision and are generally not accepted for official color vision tests.

Sources

  • FAA color vision testing for pilots (Item 52): https://www.faa.gov/ame_guide/app_process/exam_tech/item52/et
  • FAA acceptable color vision tests for ATCS: https://www.faa.gov/ame_guide/media/Acceptable_ATCS_Tests.pdf
  • UK CAA colour vision guidance: https://www.caa.co.uk/aeromedical-examiners/medical-standards/pilots/medical-conditions/visual/colour-vision-guidance-material-gm/
  • US FMCSA driver vision requirements: https://www.fmcsa.dot.gov/regulations/medical/visual-requirements-and-commercial-drivers
  • STCW medical fitness and eyesight standards: https://www.edumaritime.net/stcw-code/stcw-i-9-medical-fitness-eyesight-standards
  • US military color vision review, Military Medicine (2022): https://academic.oup.com/milmed/article/188/1-2/49/6555872

This guide is for general information. It is a screening resource, not a diagnosis, and it is not an official occupational or aeromedical test.

Types of color blindness