For me, I would use it in game/thumbnail notes to see what the saturated and dominant color of the game/thumbnail is or other projects.
I could see this useful for people who do a lot of CSS or other color-based projects helping them build a pallet in the properties
Add a property type for colors that will take in common color types and display the color in a small square/circle or something off to the side.
This could include a color picker.
None is known at this time.