Tell them to fuck off, my school tried to make people who wore these boots colour in the white bits so they were all black:
A lot of kids did and as a result had fucked up marker pen shoes, my brother and some other people decided not to, and nothing even happened. The teacher would shout at them, but that's all they did. Every time they'd pass the pupil they'd just say "colour in your shoes" and that'd be it. The same thing happened when someone in my form grew an afro, and again when someone shaved his head to a 1, and again when people started wearing black jeans instead of pants. It even happened to me when I refused to have a shower after PE because I spent the entire lesson sitting on the grass with some mates (Cricket is possibly the worst sport ever), and the teacher threatened to throw me out the school if I didn't shower, I just told him he was a pedo. I don't know if your school is like that, but
everything in my school was just a front.
There was also a Muslim kid in my school who had a full beard in year 7. I still don't know how that was possible, it was a beautiful fucking beard, and I know people 25 years old who still can't achieve a beard like that. It's funny too, because they told white people off for growing beards, but not Muslims. Damn racists!
EDIT: Say you're Jewish and your God wants moar beard?