Seconded, I would love to see support for saving and loading color palettes, and maybe even a more general save & restore feature that saves all current progress.
I’m trying to use this app to make art on Wplace and I love the amount of variables this has, however manually importing the 64 Wplace colors is tedious. Maybe I’ll try the CLI tool instead, but a GUI makes more sense for ease of experimentation.

Looks like I got it to work, and fixed a bug preventing text input too. Will push an update soon.