Running out of colours

It seems every major illness has its own colour now. We've got red for AIDS, we've got yellow for cancer, we've got pink for breast cancer (actually those coloured ribbons already seem to have divvied up the spectrum).

And you can't just pick up new colours either, because green is for the environment (or maybe blue is the new green, I'm not fully up-to-date).

And then you've got all kinds of black label, white editions, gold and platinum... at some point all the major colours are going to be taken. (Actually they already are.) What if you have a worthwhile cause to promote, but no major colour to promote it with?

You end up taking some weird shade like Periwinkle.

Fail.