Change back color in the task manager

Hello

I am using OpenSuse 13.1 and KDE

How do I change the color of task manager?
I Need to do this because the tables of the work areas, in the pannel, are almost invisible.

Thanks in advance.

Configure Desktop/System Settings - Workspace Appearance - Desktop Theme, or just run the following command from terminal:

kcmshell4 desktoptheme

Thanks susegeeko, now I have a task bar ok