is it possible to change the color of the mute buttons
Not at the moment.
I’ve no idea if the buttons have multicoloured LEDs in, so that it’s something that could be included in the future.
May I ask why you want to change them?
the red color stands out very much on the remote control and sometimes you forget whether it is turned off or on
But if it is red, the channel is clearly muted…so where is the problem for you? Could you elaborate on your statement?