In most widgets, there is a
-background and a
color. In addition to those, we also have the
-selectforeground color options in a Listbox. When
a Listbox entry is selected, it appears in a different color.
Although you can change the color of the selected text, you can use only one color. You cannot make different lines in the Listbox different colors.
In Figure 7-2, the Listbox on the left has
=> 'green'. The Listbox on the right has
'green'. Make sure the foreground and background
values contrast with each other if you change these options.
Figure 7-2. Examples of -foreground, -background, -selectforeground, and -selectbackground