Color
can greatly enhance a user’s experience with your form if it is
used properly. Large amounts of color may cause eye pain. Too much
color can obscure foreground text.
Designing forms for accessibility involves considering some additional
guidelines for using color. Colors can emphasize and enhance certain
parts of your form, but you should not convey information by color
alone.
For example, a red asterisk often indicates that a text field
requires user input. Because users with vision impairment may have
difficulty seeing the color red, a better choice for accessible
forms is to set the text field type to User Entered - Required and
define a message that indicates that the field requires input.
Many users with vision impairment rely on high contrast between
text and the background to read the form. We strongly recommend
that you use the default font and background colors, Black on a
white background provides a high-contrast that improves the readability
of the form. If you must change these default colors, ensure you
choose an appropriate combination of high-contrast colors.
Design your form to interact normally with other applications
and system standards, including support for standard Windows Control
Panel settings for colors. Users with vision impairment or those
who are color blind may have difficulty seeing the cursor. Use standard
settings for color may help eliminate this issue.
While designing your form, test it frequently using a color scheme
setting similar to what many users with vision impairment will be
using to complete your form. This practice helps you discover and
correct issues early in the design process.
