That sounds great! Even better would be if we could somehow edit that palette and have the corresponding colors change on the sprites, but I get that that's a lot more work.
Also, thank you so much for making a Linux version of this software!
Something of that regard is on the works - not for this particular version, mind you, but it is something I had on my mind for a while.
Glad the Linux version is being useful! It is good to see Linux being more used nowadays.