Can't change desktop color

Hey everyone. For some reason, I can't change my desktop background to a specific color. I want to change it to either a neutral gray or even black. When I click on System Prefs -> Desktop & Screen Saver -> Solid Colors, I only get to pick from 10 colors and they are all pastel colors. What am I doing wrong or what am I missing?? How can I change this??

Thanks for any help. (MBP 2.16 Intel Core Duo)

yep, that's it.
of course, even with a rudimentary paint-like program, you could make new files just by opening the ones you see, changing the color and then saving as a new file (or even over the exisitng file).