I've tried several different color settings with different skin/player styles. It seems like I always just see a default color for that particular skin. I've tried looking in several different browsers, closing and then re-opening browser, checking that the value is written into the XML file.

Not a big issue -- but would be a nice touch if I can get it to work.

Frank, each skin is a set of PNG images saved in the "skin" folder near with the player. When you use the skin, the colors is applied only to the submenu and texts. If you want to change the color of the skin element, you need to open skin PNG image in the photo/image editor and change the colors.

Seek bar images: skin/seek/...

Yes, thanks, that works.

A change in wording for the UI might be in order, since "Seek Bar Color" sounds fairly specific to the bar itself.