the 200ok weblog

• Colorblind Barrier Free | How to make figures and presentations that are friendly to color blind people: The frequency of colorblindness is fairly high. One in twelve Caucasian (8%), one in 20 Asian (5%), and one in 25 African (4%) males are so-called 'red-green' colorblind. ... There are always colorblind people among the audience and readers. There should be more than TEN colorblinds in a room with 250 people. Not only covers what not to do, it suggests what you should do. Includes a short but full explanation of colourblindness.
• Accessible Information Solutions - Colour Contrast Analyser: lightweight PC application based on the Juicy Studio Colour Contrast Analyser. The checker is also available as part of the Accessible Information Solutions - Web Accessibility Toolbar for IE.
• Colour Contrast Check - snook.ca: one of the niftiest colour checkers I've ever come across. Uses slider bars to try different shades quickly and easily.
• [ws] Color Scheme Generator 2: another nifty tool which helps you generate a colour scheme, then (using the dropdown at the bottom) see how those colours would look to someone with the various forms of colourblindness.
• Colorblind Web Page Filter: enter a URL and see a colourblindness simulation.
• Vischeck: Vischeck simulates colorblind vision. Daltonize corrects images for colorblind viewers. What more need I say?
• VisiBone have a range of resources including online colour pickers, Adobe colour sets and some nice posters/reference cards/reference booklets. We have several copies of their posters plastered around our office showing the web-safe colours and a rough equivalent for the most common form of colour blindness. Old news for us, big news for many of our clients.
• An explanation of colorblindness : journal : // hicksdesign. Tongue-in-cheek, but it kicks off quite a discussion.
• Accessibility Color Wheel gives an on-the-fly simulation of how a colour combination will look with different forms of colourblindness.
• Sim Daltonism, a colourblindness simulator application for Mac OSX.

By the way, in case you ever wondered... colourblind drivers can tell the difference between red and green traffic lights by their position on the pole.