This isnt an issue but a suggestion

[Sharkacuga]

My suggestion is that you can change the individual buttons on the controller (for example say if you want to change the A button to red then the B Button to blue) and like this photo

[MCMi460]

I'm pretty sure this isn't digitally possible for the Nintendo Switch. The controller's files generally contain two-three color files, one for the buttons, one for shell, and one (pro controller only) for the grip. There might be a sys-module you could make on your own if you want that sort of thing, however.