What is the use case for two levels of background colors?

Hi all,

Does anyone know the use case for having two levels of background
colors, specifically one background color on the individual lines of
text and another on the region/window?

The only thing I can think of is that it could make the text more
readable for some people. However, if that is the real use case I
think relying on regions for it is unacceptable, because the author
may not have used regions at all. A robust solution would require the
user agent always add that extra layer behind all cues.

Thoughts?

Philip

Received on Friday, 9 May 2014 14:08:09 UTC