I am trying to fix a few things in my current color scheme in KDE. I think it is too difficult to see the difference between active and inactive tabs. Which color do I need to change to make the active one brighter? Example of the current situation is here: http://i.imgur.com/5XiT2.png (Konsole tabs). The IRC tab is the one that is active in the above, however, this is very difficult to see.

The colors of the tabs are probably dictated by System Settings > Application Appearance > Colors.