Erik D. Kennedy goes into detail on how to pick color variations for your designs:
Element states for example are variations on a single color, let’s take “blue”. The result isn’t best described as “a palette of 3 blues”. It’s one blue with variations.
But this begs the question: how do you actually modify a color to get good variations?
We’ll get there, but I want you to understand this stuff from the ground-up.
Spoiler: It’s not a matter of adding some white or black to the mix. It’s something entirely different.