My Vivoactive 4 screen colour is very dull , almost grey ! Why is it like this ? I assumed it was going to be black with vibrant watch face colours popping out against the black background . When I turn up or turn down the backlight it makes no difference. Indoors its particularly bad as the screen looks almost grey ! Is this normal for a new vivoactive 4 watch ? I'm actually thinking of returning it after one day of use !!!