Color Palette Asset / Node

Blender lacks any management for color palettes. I propose a new asset type called "Palette" - implementation specifics are up to debate, but it should at least allow for storing Color information in RGB and HEX formats.

In this proposal I would like to focus on color palettes for node workflows, but ideally Palette Assets should be accessible in Vector and Texture Paint editors. Mockups and ideas are welcome.

For Node Editors I would like something simple like on this mockup. A dropdown for choosing a palette from all Palette Assets. For palettes created in Blender from scratch it should be possible to code an operator that saves a palette to a text file.