Change tab colors

Hello,

My site http://www.nhadep.net/vi/ have 5 tabs display 5 different categories but all the tabs have the same boring color.

Is there anyway to make 5 tabs have 5 different colors?

e.g.
1. Tab 1 active: Blue color with 100% opacity. Tab 2,3,4,5: Green, Grey, Orange, Black with 70% opacity.

2. Click to tab 2 active: Green color with 100% opacity. Tab 1,3,4,5: Blue, Grey, Orange, Black with 70% opacity.

Please take a look screenshot attached.

Thanks and have a nice day,
Tuan.