Created attachment 91904 [details]
screenshot 

I am using 2 really big screens for code development, so all the window backgrounds have been set to black color, in order to make it easier and less tiring for my eyes.
NetBeans is highly customizable, so I could set the color theme there easily. I do have a problem though with the code completion pop up box (see attachment). It seems that the background color of the box is set to be the system's background color (from the system theme), while at the same time, the text colors are fixed and non customizable. This causes the text to get invisible in many cases, so you can't really use the great functionality of automatic code completion. I believe that the correct way of assigning colors for the component would be either to have them all hard coded (as is now, but add background color to whit-ish too), or make them customizable. I would suggest one of the following fixes:
a) Set background color to standard white (quickfix)
b) Use the same color set with the editor, which is customizable through tools->options menu (best fix to my opinion)
c) Add the possibility of customizing the colors independently (I think it involves more work, and not really needed).