Color Palette Accessibility Testing
Before moving forward with a new brand color palette, at a life insurance tech start up (specific name available upon request) we wanted to ensure we've done our due diligence researching colors for accessibility. In particular I wanted to make sure we chose colors with high enough contrast to each other for someone with colorblindness to differentiate between, and high enough contrast of colors against writing in white.
First I tested and examined the old color palette. I found tools that would allow me to measure the difference in contrast between colors.
General Accessible Rich Internet Applications (ARIA) Practices
Accessibility Color Wheel
Deuteranope, Protanope, Tritanope measures
Accessible Color Evaluator
Color Check for ADA
Color Oracle (simulator to "see" images like someone who is color blind)
Color Contrast Determinator
Color Contrast Checker
How to Design for Color Blindness
Colorable for White font contrast
Color Palette Generator
Web AIM Color Contrast Checker
Almost none of the old palette (shown above) had colors with high enough contrast to each other to be discernibly different for someone with color blindness.
New Color Palette
After a series of new colors were user preference tested then I also measured their contrast. The new colors were tested and have high enough contrast to each other to still be rendered as different for people with colorblindness. Also all colors met accessibility standards to have high enough contrast against white font.