For those with an interest in this aspect:
The colors visible at this performance in Paris are strikingly appropriate for M4:
BLUE and WHITE.
The BLUE of the lighting and windows helps provide an ambiance of a child's imagination of what heaven would be like.
The WHITE of the dress of the soprano contributes to the impression of an angel addressing the audience.
Yes, the music is always the main thing, but as with food (even heavenly food) presentation makes a large contribution to the enjoyment.