Specify all colours for a colour scheme. If only a background is given it
might be the same as user-specified defaults for a foreground.
Ensure specified colours have sufficient contrast to be read.
body background=bg.gif
becomes
body background="bg.gif" bgcolor="#8e0851" text="white" link="3fa" vlink="5f5"
Don't forget images!
Related Checkpoint: WCAG2.2
Improved example
