Testing for Colour Blindness

The percentage of the population suffering from colour blindness varies depending on location and race, but it can be significant (4 - 10%). While some suffer from total color blindness (seeing in only shades of gray), this is rare. Most of those who are colour blind have difficulty distinguishing red from green. Some small percentage cannot distinguish blue from yellow.

We test our sites using colour-blindness filters to confirm that this percentage of the population is not exluded from those sites.

For more information on colour blindness, visit:

To test your existing web site for accessibility by the colour blind, visit: