How to make each bar of different color

[JARKUS]

Hello,

at first I´m sorry for my english and second I would like to ask you how can I make each bar (on the left side) to have different color? I´m using Prestashop 1.5 and default theme.

 

I would like to try my page with different color bars and in final I would like to put an image to bar like there will be bar with Informations so I would like to put there image like: http://upload.wikimedia.org/wikipedia/en/5/54/Information.png

If you know what I mean

Thank you