One thing lacking in Gnome is the ability to change the color scheme of your chosen theme. More precisely, gnome-theme-manager doesn’t currently allow you to customize your colors. You can change your icons, window borders, and controls, but you can’t change the color scheme. The color scheme is set within the chosen Theme itself and currently cannot be easily changed/edited by a user.
This is about to change, and I, for one, will be one step closer to be fully Microsoft Windows-free!
Thomas Wood, the developer, also tells us:
“My current plans include the ability to specify a number of different color schemes in the theme itself (including translations of the colour scheme names). If you set your own colours, you will set the current colour scheme to ‘Custom’, and will always be able to pick one of the schemes from the theme again.”
Just like in KDE. Wicked sweet! That is one thing I love about KDE, though. Highly customizable. 
Thank you, Thomas!
I hope the gnome theme manager really improves. There are too many types of theme manager softwares out there that are able to be used instead of gnome theme manager. However, it defeats the purpose of Gnome if they are not able to make it more user friendly…. I am tired of Microsoft and I want ubuntu to work………
[...] and other aspects of your panels. The gnome-theme-manager applet doesn’t have those options, yet. Not being able to change the color is a problem when using transparency or dark themes; the [...]