Comment 0 for bug 498674

The background of the stack area and the splitter box don't follow the
system color settings when you change an individual setting or the theme.

Comment from Irénée, author of the ErrorBrowser:

This will require more work. Most of these controls use Resources images
to paint themselves. This includes SplitterBox, ErrorBrowser, ErrorList.
If we want changing the Background color on the fly, we also should
expect the same for the Foreground color.