 background color.
On such emulators, the color may also be specified as a three-digit hexadecimal
number prefixed with <code>#</code>, with the digits representing the amounts of red,
green, and blue, respectively.  This tells <code>nano</code> to select from the
available palette the color that approximates the given values.
</p>
<p>The color pair may be preceded by <code>bold</code> and/or <code>italic</code>
(separated by commas) to get a bold and/or slanting typeface,
if your terminal can do those.
</p