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International Color Blind Awareness Day

September 6th is International Color Blind Awareness Day. It was John Dalton’s birthday. He was one of the first scientists to study the condition and to make strides in color blindness research.

Color blindness impacts 1 in every 12 men and 1 in every 200 women. Most color blindness is inherited genetically. People often become aware of their condition in childhood. However, some people may not realize they are color blind simply because they are not aware that others see color differently. That’s where testing comes in. There are a number of color blind tests online. Eye doctors can also administer testing. The most common type of color deficiency test is the color plate test.

Ishihara test plate to test for color vision deficiency

Color contrast between text and background is important. It affects many people’s ability to perceive the information. Colors with poor contrast will increase the difficulty of navigating, reading, and interacting with websites and apps. Good design includes sufficient contrast between foreground background and colors. Not just for text but also for images links, icons, and buttons. This is an evergreen (pun intended) post about the importance of color contrast in digital accessibility.

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