User blog:Cientific124/How can I do this type of palette?

Hello people,

This is my first post here. I want to know how to make this specific type of palette:

It's like a The_None image style palette. I don't know but I really like this type of palette. I want to put a bit of fun images with this palette to my char, but I don't know what program makes this palette up. Any help wil be greeted.