Double denim and two-toned hair

Yey, my new shoesy ^

I was just thinking, no-one EVER wear double denim. But i actually really like the look, its sort of American and its looks good if you wear two different colours of denim. 
I really need help with my shitty hair! Should i keep it this colour on the bottom or go blonder..arcggjhfdjsfghwu HELP!?!?