Information and tools about color vision deficiency. Online color blindness tests, tools to check color names and many interesting facts. http://www.color-blindness.com/
The Colour Blind Awareness organisation has been founded to raise awareness of colour blindness (colour vision deficiency) and aims to be the first point of reference in the UK for people seeking information on colour blindness. http://www.colourblindawareness.org/
What is it like to be colorblind? http://www.businessinsider.com/what-like-colorblind-tetrachromat-2016-7
Simple demonstration, using coloured pencils, showing four types of Color Blindness: Tritanopia, Protanopia, Deuteranomelia & Total Colour Blindness. https://imjustcreative.com/color-blindness/2017/01/26
Simple guidelines along with plenty of examples to help you effectively ensure that a good percentage of your audience won’t misinterpret your message. http://www.particletree.com/features/interfaces-and-color-blindness/
The Enchroma color vision test checks for the most common types of color vision deficiencies. If you have color blindness, our test can tell you if your color vision deficiency is mild, moderate, or strong. Uses Ishihara’s color dotted plates. http://enchroma.com/test/instructions/
Alternate color vision test. http://www.opticien-lentilles.com/daltonien_beta/new_test_daltonien.php
Advanced description of how rod and cone cells work: http://thebrain.mcgill.ca/flash/a/a_02/a_02_m/a_02_m_vis/a_02_m_vis.html
Simple description of how rod and cone cells work: http://www.webrn-maculardegeneration.com/rods-and-cones.html
Lucky Tetrachromats See World With Up to 100 Million Colors: https://science.howstuffworks.com/lucky-tetrachromats-see-world-100-million-colors.htm
Chroma is a wearable Google Glass augmented reality app with manipulated colors that allows color blind people to overcome color deficiencies. http://chroma-glass.ucsd.edu/
Enchroma makes glasses with an optimal filter, targeting specific photopigments. Enchroma‘s multinotch filtering, cuts out sharp wavelengths of light to enhance specific colors. Enchroma lenses separate the overlapping red and green cones, helping improve vision for people who have difficulty seeing reds and greens. http://enchroma.com/
Analyze a web page or portion of a web page for conformance with WCAG 2.0 Color Contrast requirements. This Chrome extension allows you to analyze text color contrast problems on a webpage according to the WCAG 2 text color contrast requirements. It evaluates the page as it appears in the browser, so it is able to handle text over gradients and advanced CSS attributes. You can choose to analyze a portion of a web page, the entire visible contents of a tab, or an entire web page. https://accessibility.oit.ncsu.edu/ https://chrome.google.com/webstore/detail/color-contrast-analyzer/dagdlcijhfbmgkjokkjicnnfimlebcll
Color Oracle is a free color blindness simulator for Window, Mac and Linux. It takes the guesswork out of designing for color blindness by showing you in real time what people with common color vision impairments will see. Color Oracle applies a full screen color filter to art you are designing – independently of the software in use. http://colororacle.org/index.html
Visolve is the software tool that transforms colors of the computer display into the discriminable colors for various people including people with color vision deficiency. In addition to the color conversion, it also has color filtering and hatching capabilities. http://www.ryobi-sol.co.jp/visolve/en/
The Colour Contrast Analyser (CCA) helps you determine the legibility of text and the contrast of visual elements, such as graphical controls and visual indicators. https://developer.paciellogroup.com/resources/contrastanalyser/
Tips for designing scientific figures for color blind readers: http://www.somersault1824.com/tips-for-designing-scientific-figures-for-color-blind-readers/
The Colour Contrast Check Tool allows to specify a foreground and a background colour and determine if they provide enough of a contrast when viewed by someone having color deficits or when viewed on a black and white screen. The tool will indicate that the colours pass the test if both the colour difference and the brightness difference exceed their threshold. It will indicate that it sort of passes if only one of the two values exceed their threshold. And finally, it'll fail to pass if neither value exceeds its threshold. The tool will also indicate if the colours pass the newer WCAG 2.0 contrast ratio formula. https://snook.ca/technical/colour_contrast/colour.html
Webaxe list of tools for web developers: http://www.webaxe.org/color-contrast-tools/