Each color button in the Color window
represents one of the colors in a palette:
The ``Background'' color is used for all windows
on the screen, with the exception of the window in which
you are working.
The ``Foreground'' color is used for text.
The ``Top shadow'' color is used for the outline
around all window frames.
The ``Active window'' and ``Active top shadow''
colors are used to identify the window you are working in.
The ``Active foreground'' color is used for text
in the active window.
The ``Alternate background'' color is used for the Desktop
background, and for scrollbar and slider bar troughs, and the icon
box background, if in use.
The ``Highlight'' color outlines buttons when you click on them.