You don't understand what I said, and you don't seem to know much about Windows. Previously it worked like this;
1. Apply skin, skin changes desktop color.
2. If you want to then change the desktop color back to what it was, (I prefer black),
a. Right click on desktop
b. Click on Personalization
c. Click on Window Color
d. Click on Advancedd Appearance Settings
e. Select desired color from drop-down next to Desktop
f. Click apply
g. The desktop freezes and a Please Wait message pops up.
h. The selected color is then applied.
Now with WB8, after 2g, the selected color is not applied. An additional step is required, logging out and logging back in, only then is the selected color applied.
With wallpapers smaller than full screen the desktop is partially exposed. Oftentimes the background color applied by a skin does not match the wallpaper. Oftentimes a black background best sets off the wallpaper. So it's not unusual to want to choose your own desktop color and previously that was not particularly difficult. It is much more troublesome now because logging off and on may mean having to close and re-open any number of programs, files, etc.