That you depart from the code I modify to change these colors

I am sorry but I could not understand you. I guess you mean to say that you want to change the color of the tab and background? Well it is very simple. All you have to do is make changes in the css file. place image of your choice and write the color of your choice. You need to figure out. If you do not know absolutely then I can write the way to customize in the tutorial but need some time for that.