

“The new Windows Terminal is so slick! And PowerShell is soooo awesome! When will Linux get cool neat powerful stuff like this?”
“Uh… About three decades ago?”
(To be honest, PowerShell is neat. But it’s also cross platform, so if I really want it on Linux I guess I can get it there too? I don’t really need to, I’m in middle of rewriting some PowerShell stuff in Python)
Colour palettes are collections of facts. Facts don’t have copyright protection and ability to claim copyright for a collection is pretty tenuous. However, copyright may apply to certain related things.
For example: Suppose you see that someone is selling a Photoshop colour palette for money, and included the entire palette in the store image. In that case, there’s literally nothing, legally speaking, stopping someone from prodding the image with a colour picker a bunch of times. But there would be copyright protection for the Photoshop palette file itself, because that’s a more tangible piece of data.
There are also other kinds of intellectual property laws that apply to colours. Pantone gets away with whatever shenanigans they’re doing because of trademarks.