Clipping masks is one of my favorite Photoshop tools. I use it 'clip' a color to a shape then have multiple color layers clipping to that shape in my layers menu. I can then click the eye icon to turn on and off/hide color layers to quickly and easily compare which colors when I'm deciding which one I like best and which one to use for a party collection.

This introductory video is from my other ecourse: How to Make Repeating Patterns in Photoshop and Monetize Your Designs I've included the video in this ecourse as it gives a good overview of how to use clipping masks. Any reference to making patterns is for that ecourse (in this one I'm teaching you how to make party printables!)