Objects do not possess color of their own. Our eyes perceive color as different wavelengths of light that bounce off things, and our brains process that information to help us interpret the world we see in vibrant color. 

The visible spectrum lands between ultraviolet light and red light for humans, but scientists believe that humans can recognize up to 10 million colors. 

For sidewalks and now websites, color ADA compliance ensures that people with low vision are able to see a clear contrast for viewing information. While the government requires a certain standard for public areas and websites, color ADA compliance is important for more reasons than just government conformity.