Here's the link I have for my stats box (without the tags, of course... added a space so TF wouldn't parse it):
[url]http://[/url] \folding.extremeoverclocking .com/sigs/sigimage.php?un=Trotter&t=12864&c1=3333FF&c2=FFFFFF&c3=CCCCCC&c4=000066&c5=3333FF
Change Trotter to your Folding handle, and the c1-c5 to the color codes you want.
[url]http://[/url] \folding.extremeoverclocking .com/sigs/sigimage.php?un=Trotter&t=12864&c1=3333FF&c2=FFFFFF&c3=CCCCCC&c4=000066&c5=3333FF
Change Trotter to your Folding handle, and the c1-c5 to the color codes you want.