Color Blindness

... or Color Vision Deficiency (CVD)

Also see page on this site Color, which is under Creating Accessible Materials. It gives more information about creating materials with proper consideration for individuals with color blindness and low vision.

Go back to Visual Impairments

General Information

• W3C Understanding WCAG 2.0: Contrast (Minimum) http://www.w3.org/TR/UNDERSTANDING-WCAG20/visual-audio-contrast-contrast.html

• Facts About Color Blindness https://nei.nih.gov/health/color_blindness/facts_about

  • 50 Facts about Color Blindness http://www.color-blindness.com/2009/01/06/50-facts-about-color-blindness/

  • Fun Facts About Color Blindness https://www.phactual.com/fun-facts-about-color-blindness/

  • Color Blindness https://sites.google.com/site/colorblindness3042010/home

    • Fun Facts https://sites.google.com/site/colorblindness3042010/fun-facts

  • 5 Important Facts About Color Blindness http://apecsec.org/5-important-facts-about-color-blindness/

  • Colblindor www.color-blindness.com This site is "all about color vision deficiency. .... You can find color blindness tests, tools, facts, news and a lot more right here.

  • Color Blindness & Web Design https://www.usability.gov/get-involved/blog/2010/02/color-blindness.html

  • Visual Disabilities: Color-blindness [WebAIM] http://webaim.org/articles/visual/colorb

Apps & Tools: Colorblindness / Color Vision Deficiency

• VisCheck http://www.vischeck.com

• Coblis — Color Blindness Simulator http://www.color-blindness.com/coblis-color-blindness-simulator/

• Colour Blindness Simulator http://www.etre.com/tools/colourblindsimulator/ --- upload a file

• Online Simulator Shows You What Photos Look Like to People With Color Blindness http://petapixel.com/2013/02/10/online-simulator-shows-you-what-your-photos-look-like-to-color-blind-people/

  • Colorblind Web Page Filter http://colorfilter.wickline.org

• Color ID Free By GreenGar Studios (Andriod and iOS) http://greengar.com/ It "uses the camera on your phone to speak the names of colors in real-time."

• Color Inspector By Aaron L'Heureux (iOS only) http://www.colorinspector.com/

• Say Color By HotPaw Productions (iOS only) http://www.hotpaw.com/rhn/hotpaw/#5

• 20 iPhone Apps for the Color Blind http://www.color-blindness.com/2010/12/13/20-iphone-apps-for-the-color-blind/

  • Color Oracle http://colororacle.org

• Sim Daltonism (Mac only) https://michelf.ca/projects/sim-daltonism/ “It filters in real-time the area around the mouse pointer and displays the result — as seen by a color blind person — in a floating palette.”

Chrome extensions

• Daltonize https://chrome.google.com/webstore/detail/efeladnkafmoofnbagdbfaieabmejfcf

• Visolve https://www.ryobi-sol.co.jp/visolve/en/ Separate downloads for Windows, Mac, and iPhone. It “transforms colors of the computer display into the discriminable colors … In addition to the color conversion, it also has color filtering and hatching capabilities.”

• WhatColor http://www.hikarun.com/e/ Designed to help “Colorblinds to use PC without difficulties caused by colors”, and seems aimed at developers who can “now know the color of any part of the screen … talk about the screen … write manuals using color names”

Firefox Add Ons (that alter visual display; not just for colorblindness)

• LowBrowse by Aries Arditi It “creates a new frame in the top part of the browser that, on hover over, presents the text in a single line with configurable text size, font, color contrast and letter spacing without having to zoom in and out.”

• Readable by Baris Derin “It transforms text on any website using fonts, colors, and layouts of your choosing.” The easier-to-read version of the selected text appears in a new frame.

• Nosquint by Jason Tackaberry “NoSquint allows you to adjust the text-only and full-page (both text and images) zoom levels as well as color settings both globally (for all sites) and per site.”

• Theme Font & Size Changer by Baris Derin, Access Firefox Project “Theme Font & Size Changer lets you change the global font size and font family used for the user interface in Firefox. Design your browser with your favorite font.”

  • WCAG Contrast checker https://addons.mozilla.org/en-us/firefox/addon/wcag-contrast-checker/ --- You can go to any website, right click anywhere on the site, and select the WCAG Contrast Checker to obtain a list of all color contrasts on the site.