The metrics zone (top left corner) where power, HR and cadence data is displayed currently has a blue background.
I think it would be nice to see the background colour reflect the HR zone you’re in.
My coach always tells me to stay in the green zone as much as I can this time of year, with only 25 % of my time in yellow and “avoid orange and red zone until april !”. I might be able to follow that advice easier if Zwift took my HR zones (either from free input in the dashboard or after FTP testing if this becomes available in-game - trainerroad style) and adapted the background colour of the metrics zone during the ride.
KR,
Dieter