In the attached screen of SSC 4.3 in Vista using a Vista Basic Theme w/ modified colors, SSC's tool bars are pretty dark blue gray, making it fairly hard to see some icons that are similar color. What controls the color of the top & side tool bar background color? There aren't any editable choices in SSC for this color, that I see. There aren't any USER SET colors in Vista's Appearance & Settings, close to this color, it it's getting the color from Windows.
In Preferences >More Interface Options, the 1st box (on left) is for canvas background. Selecting colors from that drop list (though many of the colors have names for other objects attached to them) changes SSC's main background to the color selected
There's a 2nd box to R of it that doesn't say what it's for & I can't see it has an effect on anything. in the 2nd box's list, there are objects like clMenu & clMenuBar w/ colors assigned to them, but I see no way to change colors for those items. Also a "Custom" option in the 2nd box's drop list. I see no effect from changes there, either.