Transform to your pictures into 4 colors!
4 colors for each tile was a limit on some old game consoles. This mimics those and gives 4 colors only to your art. Great for pixel art, but can also be applied to designs and regular illustrations for interesting looks.
Here's all of them below. Feel free to screenshot this and use it as a color palette instead if you'd like. :)

I did 3 examples to show what the colors look like at different value sets. Left to right: medium grey, light, & dark.

Some of the gradients below:






