Based on the Hypselodoris Bullockii.
I felt like we needed some more purple and I'm a little obsessed with Sea Slugs and Nudibranch.

Probably a Red Solid Dark Base. Or Red Countershaded Medium or Dark Base.

Merlot/Prismatic/Cassius/Beet/Rough Ruby/Hibiscus/Deshret/Pulsar/Jellyfish x Decennial/Shedua/Hexaplex/Citron

Special Breed Only base?

yeah it may be a little much but i like it.

https://imgur.com/gallery/lioden-base-7z0RxEH
https://imgur.com/gallery/lioden-base-lined-jHmiVtI