Based on Pumpkin which is shipped with Kubuntu. Only text colors are changed to give a more Ubuntu-like feeling.
(For desktop background I picked 'active titlebar' and the 'window background' colors from the color scheme and picked 'vertical gradient' between them. The theme I use is "Platinum".)
Hope you enjoy this slight tweak towards a more Ubuntu-like Kubuntu. There seems to be a lot of other stuff here too to help you out. Seems like some people, like me like the KDE functionality but can't stand the Windows-like look of it. :-)