BLACK, LIME, TEAL, PURPLE
Which I found a little hard to do...but hopefully I pulled this one off in my birthday card:
Ava Mermaid and a little "dot" technique I've "learned" from Cheryl at The Ink Trap. I obviously need lots more practice, so please check out her tutorial for what this should really look like! Plus, her work is AMAZING, so you'll really want to follow her.