To change color of the left hand panel in explorer, open Vista explorer IE shell parts subsection in SKS 7 then select edit vista/7 explorer parts, then select folders bar then at the bottom of this item select extra settings this will then show background color. Either select a color from drop down menu or click on button next to it and you can add a colour of your choice then go back to drop down menu and select it after clicking back to the edit vista 7/explorer part screen select save skin and then click apply skin this will change the left hand panel of Windows explorer
Hope this helps
PS to SKS developers I wish you could also add a textured colour to left hand pane in Explorer by using an image instead of a colour.