You probably need something that’s equidistant from the two colors on either side, a betwixel, if you will.

Y’know how text will often have reddish pixels that smooth out on one side and bluish pixels that smooth out on the other?

Flip the canvas? Without seeing what you’re working on it’s kinda hard to give advice.

Double the resolution so you can have more colors to blend.

Then double again. And double again.

Until you get 4096 x 4096. Now that’s pixel art.

use voxels

ummm… procedurally generate all the combinations