There are several faces speedbar generates to provide a consistent color scheme across display types. You can customize these faces using your favorite method. They are:
Face used on Files. Should also be used on non-directory like nodes.
Face used for directories, or nodes which consist of groups of other nodes.
Face used to highlight the selected item. This would be the current file being edited.
Face used when the mouse passes over a button.
You can also customize speedbar’s initial frame parameters by changing
the alist speedbar-frame-parameters
. This variable is used to
set up initial details. Height is also automatically added when
speedbar is created, though you can override it.