The -bg and -fg options

Most clients also accept the -bg and -fg command line options. These options control the following elements of a client's display:

-bg

sets the client window's background color

-fg

sets the client window's foreground color (usually the color of the text in the window)

You can set these options using either a color's database name or its hexadecimal RGB values.

For example, to run the xclock program with a plum background and navy text, enter the following at the command line:

xclock -bg plum -fg navy &

If a color name includes blank spaces, you need to include quotation marks around the name. For example, to specify light blue as the background for xclock, enter:

xclock -bg "light blue" &