For a costume for LO, I found the cutest blue wig on etsy, but she would never leave it on for longer than 1 second. So I was considering using the colored spray stuff from the party store in blue. My LO has SUPER light blonde hair, and I'm nervous that blue wouldn't come out so easy?

Anyone ever used this stuff?

My hair is very light also, and a long time ago I tried Blue Malva shampoo and conditioner from Aveda and it totally left a couple of blue streaks where my hair was the lightest. My colorist said that really light hair just grabs color. So maybe that's why I'm nervous!