OK, this is not a really big deal, but sometimes minor suggestions like this are implemented because they are minor.
Anyway, when game pops up a window which is smaller than full screen, it gamma corrects the background and shows the full brightness window on top of that background, like this:
The background has some valuable information, such as timer on the right and any red notifications on the left. But those of us with less than perfect vision find it hard to read. It is darkened too much, and barely readable.
I suggest a little brighter background, so that the info shown can be read. While it should be darker than foreground window, it is too dark as implemented now.
Name: Rusty (Rustyx in game)
Guild title: resident wisenheimer.
Line ID: Rustytroll (big shock there, eh?)