ArrayList Rainbow custom saturation and luminance

[Doogie13]

Is your feature request related to a problem? Please describe.
I want to be able to change saturation and luminance of the ArrayList when using rainbow mode

Describe the solution you'd like
Ability to change the saturation and luminance of the Arraylist when using rainbow mode

Describe alternatives you've considered
Not changing the saturation and luminance of the ArrayList when using rainbow mode

Additional context
Ability to make it look like RusherHack ArrayList because it looks nice

[mmvanheusden]

open a pr 😂