I like the Sublime Text 2 default color scheme Monokai alot. The only problem is the tab colors, the selected tabs and the rest of the tabs all look the sam
Packages/Theme - Default/Default.sublime-theme (as said Romain)
Then search for the comment Tab Labels and change the fg attributes of the classes that contain selected from 255, 255, 255 to your new color (255, 0,0 for red).