cubase question

I want to change the sequencers background colors how do I do this?????

I want the first 8 bar to be blue, second 8 bar to be navy blue etc. I know you can change the colors of the audios in the tracks but I want to change the background color so that I its somewhat divided into categories. I dont know if you understand but what the ****!!!!

as far as I know u can only change the color of the audio parts but not their background...