[dev] Some minor tweaks for category color prefs

[Chuck Hagenbuch]

Quoting Jan Kuipers <jrkuipers@lauwerscollege.nl>:

> Changed #ffffff to #FFFFFF

Why?

> and set the backgroundcolor of the input boxes to the current category 
> color.

That's nice, I'll have it committed in a few minutes.

-chuck

--
Charles Hagenbuch, <chuck@horde.org>
"After a few minutes the most aromatic and nice smelling Italian coffee 
 will come out of the exhaustpipe." - Our stove-top espresso pot