I agree 10soonerlater, but so far I've gone into the high contrast themes twice. I can change all sorts of parameters on the windows. But when I select "desktop background", no matter what I change it to, it comes out blinding white or totally black. I'll go back in and see if there's a parameter inside the high contrast thing I'm missing.
Just went back in. I can change window background, text, hyperlinks, disabled text, selected text, active window title, inactive windows title, and button settings. But I don't see anything for changing the desktop. And when I go to desktop background and set the custom color I want (127,127,127 - 14% gray), it changes it to blinding white... Even some of the preset colors don't come out the way the preset looks when set as the background. It's not a huge deal - I'm currently using the dark gray for the desktop, which is less awful than blinding white, but I'm gonna rummage around and see what I can find.