(c) COLOR USAGE & CONTRAST
Information conveyed with color must be understood without color.
Roughly 1 in 20 people have some sort of color vision
deficiency or are "color blind."
It is important that you design your Web pages so that
all information conveyed with color can be understood without
For example, when providing an online syllabus, do not
specify that quiz dates in red
are real, while quiz dates in green
are only practice. Certain colors, such as red and green, are not distinguishable
to people with color vision deficiencies.
Learn more about color vision
disabilities at VisCheck.
Text color must be in high contrast to the page’s background color
or background image.
This guideline is especially beneficial to people with
low vision. Some things to look out for include:
The color of your text
and background colors should be in sharp contrast to each other. Ex:
do not use yellow text on a white background. Black on white or white
on black is fine.
Try to avoid "busy"
wallpaper backgrounds. Text often disappears on these textured and