Cotton candy blue is the first thing that came to mind with Pink Perception's makeup bridal look. It's got a fantasy vibe about it too that is appealing, which could be something cosplayers would get into as well.
Pink Perception doesn't offer a definitive tutorial on this look but gives product details:
Shadows are Anastasia Beverly Hills "Mayamia" palette.
Liner is LBD from Motives Cosmetics.
Lashes are "Iconic" from House of Lashes.
Brows are Anastasia Beverly Hills dip brow in dark brown.
For added inspiration, I wanted to add two cards for you to check out. Madonna just released pics of her pink strands. But that's been done. Hilary Duff went blue recently. This might be a wig, but you could take this to any salon and they'd make this happen for you. Easy.