I'd love to have a grid where I can set a custom colour in each cell. I can't use regular palette creators after using this one, but I really like the grid based approach as well.
You will probably need to make a base palette here, then download it as a big PNG image, then tweak it in your image editor of choice ¯\_(ツ)_/¯
"What if I were to teach you some miracles... Would that please you?"
