there is two ways
1-by the photo shop
2-by Xnview(easy way)
i will explain on Xnview it doesnot take alotof steps
1-downlad

2-open the program

3-open your client from the program then choose data/interface/style01/main

4- choose the Bar u want to edit

To play with color just change in the Brightness and the HUE
5-change all the bars and then you r done
after step 5 if you need more explain see undergroundLeader Post
