When the light of the sun is filtered through the atmosphere and partially scattered, particularly when it is (visually) near the horizon, in early morning or late afternoon,
…when it has the greatest amount of air to pass through, it will appear reddish orange, but that is not the actual color of the sun, which I would describe as a slightly yellowish white. The color of the sun is the result of its temperature. To actually be reddish orange, the sun would have to be much cooler than it is. (MORE)