Mermaid To Order is a metallic medium to deep green with a slight shift to dark green/blue. It looks so much like the ocean in my opinion.
This is two coats of Mermaid To Order, 3 coats of holo topcoat and Orly topcoat.
Sephora by OPI- Mermaid To Order w/o holo topcoat
Mermaid To Order and holo topcoat
You can buy Mermaid To Order HERE! I also bought my holographic topcoat from Copious. (That is my referral link) but you can find holo topcoats on Etsy too.