This list of yours is really cool! Thanks for sharing!
Also, this thread - actually, your link - made me think about this enhancement: https://github.com/nesbox/TIC-80/issues/454. I hope it gets approved and worked on.
Hey there o/
Im creating this topic to share a link I just saw on twitter: https://lospec.com/palette-list
It contains a huge list of pallets used by games and/or consoles. You can even filter by the number of colors in the pallet (tic80 uses 16).
It is really cool and useful.
I hope you all can enjoy.