You make good points. And there's yet another confirmation using the exact same colors
But I wonder if the girls really get to pick their colors? ^^;
I'm still holding out for teal on Masaki, but man - Dark Blue for Ayumi and Dark Red for Haruna are like, my picks.
It's a little dark for Periwinkle, but it does have a bluish purple look. Kinda like whatever color this is:
http://en.wikipedia.org/wiki/Majorelle_Blue