Lavender and brown.
fug the dress though, that's some simple optical illusion poo.
I've still never understood how this fuging spinning dancer works:
Do you see her as spinning clockwise or anti-clockwise? Well... keep on watching it until you see her pull the ol' switch-a-roo on ya. If it takes too long, take a break and try again.
I've tried a few times, but I always see her going counter clockwise. Are you staring at a certain part when it goes clockwise?