Hello!
I am not the most savvy in terms of UI so I need some help creating a saturation slider as I really don’t know how to. Note that I need help creating the visual, not creating the functionality.
I’ve tried using UI gradients but it seems UI gradients overlay their colour instead of modifying it, therefore I can’t figure out how to create a slider that gradually goes from grayscale to coloured.
Here’s what I have now, the leftmost side should be grey, matching the value of the purple and gradually goes to more saturated, eventually being 100% saturated on the right.

TIA for any help! 