Could try unticking the
Translucency (again within
Configure Your Desktop >> Workspace Appearance & Behaviour >> Desktop Effects >> All Effects ) and see if that helps - note, may need to restart your desktop (logout and in again)
Additionally, to get some nice looking colours/themes etc for your desktop you can try going to
Configure Your Desktop >> Common Appearance & Behaviour >> Application Appearance >>
Coloursand
Configure Your Desktop >> Workspace Appearance & Behaviour >>
Desktop Themeand
Configure Your Desktop >> Workspace Appearance & Behaviour >> Workspace Appearance >>
Window DecorationsIf you look at some of those you may see somethings to suit - there are of course icons / fonts / and more which can be changed but I'd suggest doing the above one at a time simply because you may not know which setting has done what if they are all changed in one go
