^^ I’d think just using the color picker would be simpler personally but it’s good to hear what would help other peoples work flows.
I tried to hack the keybinds to help with your issue (making the keybind for next and previous layer the same as the keybind for next and previous color index to kinda auto cycle to the right one when you swap layer) but Aseprite doesn’t wanna let me have duplicate binds. ^^