There seems to be common response that morning is golden and evening is more red.
So I consulted my wife who is a mentor on the physics forum. I asked her to post the question there. She rolled her eyes and me and said this is not a difficult question.
The cool, humid night settles a lot of dust out of the air. By evening, the drier air and daytime activities and winds pick up a lot of dust. Dust particles scatter red light. That's the physics behind red sunsets and golden sunrises.
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