Library Text;
under Change colors, change skin defined colors, selected image.
It is a weird process to change. First choose a color off the chart, check the difference when applied, it is actually a blend of your choice, and the default color(my opinion).Then, without changing the color you chose, you can adjust that result with the slider to the right of the chart.
This can be useful when you want to match a color to the skin, but need a lighter selected image graphic for other areas, but can also be a pain. Just have to play around, best I could conclude, with the color mixes and results is the default is some shade of purple, again, guessing.
The text under the Libraries header, the actual word "Libraries", under that can also be manipulated but I forgot with what area, also a color like buttons, or buttonshadow, really forgot. I will try to recall or find a previous post about this, we had one not long ago.
The rest, not able to change as LS stated.