Answer:
off-white, blue and green
I assume it is the D, the river. The other answers don't make any sense and the river would 'reflect' the hues of the sky.
This doesn't necessarily have a technical term, it is best known as Musical Nationality
Answer:
I watched it a couple months ago and one of the transitions was dimming of the lights and/or a spotlight on shrek or donkey to divert attention from the changing set behind them
Explanation: