You can probably hack suckless' st terminal to do this without too much effort (just checking for \x1b[41m and \x1b[100m and the reverse attribute is probably e

You can probably hack suckless' st terminal to do this without too much effort (just checking for \x1b[41m and \x1b[100m and the reverse attribute is probably enough, not many use the 256 colours or true colours to set the background, although you can make it as complex as you want). For 99% of things it's not really an issue so I never bothered: you can either configure the colours or you can just disable them fairly easily.