This might be a different context than what you were asking but I try and have DigititalColor Meter open on my screen and when I come across a design or color s

This might be a different context than what you were asking but I try and have DigititalColor Meter open on my screen and when I come across a design or color scheme I like, I use DigitalColor Meter to help deconstruct how that design was set up. This helps break down button designs, gradients, shadows, and textures. Doing this over and over helps me understand what makes certain designs work at a pixel level.