Set your theme to Aqua.
Open ThemePark and make a new GUIkit.
Change every text color to something other than black. For items in the same "group" use wildly different colors, e.g. yellow, hot pink, olive green, etc.
After this, it might be helpful to take a few screenshots of what you did in this section in ThemePark and Photoshop them together. Print this out.
Export the theme and install it, logout/in, then note what colors show up where. This is what I've been doing to try and figure it out.