Here is a Collection of 16 color themes for Windows 7 from UNTITLEDGAME. This is A Shell - Color Replacement For The Windows 7 Basic Theme.
This Theme Pack includes all the necessary files required to install any color of your choosing, viz Uxtheme patch, take ownership registry file and also step-by-step instructions guide.
How to install the Basic theme:
First open the folder UXTHEME PATCH
Right click “UniversalThemePatcher-x86
Run As Administrator
Press all of the “PATCH” Buttons
Restart.
Click “TAKEOWNERSHIP” and add to registry.
Press YES to Install
Now navigate to C:\Windows\Resources\Themes\Aero
Find aero.msstyles
Right Click and Take Ownership
Finally Replace the aero.msstyle file with the one of your choosing.
Restart.
The Color Selection Is Large and Includes:
Blush - Chocolate - Frost- Fuchsia - Lavender - Leaf- Lime Pumpkin - Ruby - Sapphire - Sea - Sky - Slate - Sun - Taupe Twilight - Violet (All of The Colors of Aero)
Visit Download Page (Updated Link).