Mate seriously,dont be tempted to put them on,colour coded or not!
As someone has already said,they are only there to create or cover up rust.
I scrapped a 1987 316 a few months ago that had these fitted.It was in surprisingly good cond for year but the back inner/outer wheel arches were rotted away!
Probably one of the worse things you can do to an E30 in my experience,and look awful too!
but it your car.....
