Windows 7 Task Manager under the Performance & Networking tabs, has graphical animations which are green in color. But if you don’t like green and would like to change it some other color, then this may interest you.
Change Task Manager Color
Using these set of apps, you can change the default green color of your Windows 7 Task Manager graphs & animations.
Take your pick! You can change your Green color to Blue, Red, Yellow, Purple or White.
Visit its home page. If you are a customization enthusiast, I am sure that you will like this modification.
Always good to create a system restore point first!
Se7en Task Manager Modder may also interest you!