I have a problem with Eclipse Preference. I cannot see anything in the debug-layout which pops up when you hover over a variable, but sometimes pictures can say more than words:
how can I adjust the colors for that (especially the Background Color), as it appears sometimes in Eclipses Menus as well.
EDIT: According to the first answer
I tried to set to default with no result. I also cannot follow your provided guide to find debug_background option. Here is the output from Eclipse if I type Appearance inside:
I don't think I have a good answer for you, but I have my own experience. Based on what I see in your illustration, you're not running Ubuntu/GNOME, so my answer may not satisfy you.
This sort of thing is a balance between the underlying OS and the application. For example, on Ubuntu (GNOME, pre-Unity), nothing satisfactory is in my opinion possible short of changing the overall (GNOME) theme. In my case, while I like the default Ubuntu theme, I find I can't see (the same stuff you're showing) adequately unless I resort to Clearlooks. And so I gave up trying to fix this long ago with Eclipse Preferences and just always go with that theme.
Maybe this will help you or someone else.