Windows 7 Task manager color change

Tools you will need:
A copy of Taskmgr.exe from Windows\system32 directory
You can even copy over your modified taskmgr.exe and replace the one that opens with your Ctrl+Shift+Escape key combination.
Resource Hacker
http://angusj.com/resourcehacker/
A image editor capable of saving ico with transparency (not MSPaint; I used photoshop, but GIMP & Paint.net should be able to )
Resource hacker will allow you to export the icons and bitmaps you wish to alter; it will also allow you to save a new instance of taskmgr.exe with your modifications.
Hexinator
https://hexinator.com/
This is used to change the graph lines and grid colors on both the performance tab and network tab. It is also the most time consuming step.
Just open the new taskmgr.exe you created with the fancy new icons and bitmaps and go to these locations and input your hexadecimal color code.
Here is a chart you can use
http://www.pagetutor.com/common/bgcolors1536.png
though the true amount of colors is
256^3=16777216
256*256*256=16777216
(000000...FFFFFF)*(000000...FFFFFF)*(000000...FFFFFF)=16777216

>Performance tab grid
0x0B387-B389
>Physical Memory Usage History graph line
0x05608-560A
>Memory Total Usage label
0x0C345-C347
>CPU Usage History graph line
0x055E8-55EA
>CPU Kernal Time History graph line
0x055EC-55EE
>CPU Total Used label
0x0BF89-BF8B
>Network tab grid
0x0FB84-FB86
>Network tab Local Area left graph border & received histroy line
0x0567C-567E
>Network tab Local Area Sent history graph line
0x05678-567A
>Network tab Usage percent labels
0x0F8AB-F8AD