DocLotus: Many of the things you want are the kind of thing that would go in an editor, not in WindowBlinds.
WindowBlinds allows the user to have some control over a skin, but for the kind of thing you want you are going to have to edit the skin.
Regarding the size of the colour sliders, they are standard windows slider controls and will be the same size as any other sliders. If you find the text and controls too small, I would suggest considering using 120 dpi mode.
If you want to increase the contrast in wbconfig, use the black UI option (Bottom left, change language settings link)