I really wish you could use the alternate colors (the ones shown in this video: https://youtu.be/AsVzk6kCAJY) in the sprite editor, because one of the colors is perfect for a sprite I need, and none of the other base colors do it for me. It would be nice if you could hold down a key combo and the colors would change to the alternate ones.
Edit: And yes, I understand that you can only have 16 colors on screen at a time. But it would be nice if you could toggle certain colors, so you only have to replace some of them.