Have you ever felt you wanted some more options when you see this?
When you actually wanted something more like this:
Then you’d probably appreciate these examples: Color Table Utilities.
Some advanced workarounds to put more color in your docs! 
As in previous posts (Solved: Conditional Formatting by formula using absolutely ANY color), be aware that the document uses an unofficial _GRADIENT() formula and it is therefore discouraged to use it “production” docs.
Enjoy!