Yes... This plug-in is for black:
; Change Background Color plugin
; by Troglodyte
Signature= "$Windows NT$"
Name="Change BG Color"
0x1,"Control Panel\Colors","Background","0 0 0"
However, it can easily be changed by altering the value of "Background"... the easiest way to figure out the coresponding values in relation to the color, is to set your background to that color on a real XP, 2003, or 2000 OS. Then copy that value into this plug-in, and you should be all set.
Hope that was clear...