Is there an online repository of color schemes that I can try out?  I'm looking for something that uses white backgrounds for track, inspector, browser, control, etc to match the white background on dialogs, piano roll, staff view, preferences, etc.
 
(I have an eye condition that makes it hard to work with bright white backgrounds.  To compensate I use an app to invert screen colors.  So an all white background color scheme inverts to an all black background working environment, which works for me.)
 
Thanks!
 

I don't know of any. The color settings are in preferences. There are a lot of settings

...and not all of the settings work. It's hit or miss, and best to keep a pen and paper ready when you go exploring colors. Also, some colors only show that they work after you restart the program, so the process can be time consuming. I would love to have actual different themes since I consider the light grey used in Sonar to be an eyestrain. 

There is a 3rd party app called Duckbar (registration required to download) which might be useful.