Conversation so far:
how big is the sun in mercury's sky
The angular diameter of the Sun from Mercury is about 1.4 degrees.
how big is the sun in mars' sky
The Sun as seen from Mars appears to be five-eighths the angular diameter as seen from Earth, 0.35 degrees.
what color is the sky on mars
During the Martian day, the sky is a butterscotch color.

Question: how about at sunset
Self-contained rewrite: what color is the sky on mars at sunset