The sun is white, but the atmosphere reflects and scatters blue, allowing red and yellow to pass through. You see this effect in mornings and evenings when the sun’s light passes a much further distance in the atmosphere due to its low inclination. Your logic is sound, the clouds do appear orange at that time.

The only time you can safely look at the sun enough to determine its color normally is a sunset when it is tinted orange. I can see how he might have come to this conclusion but… wow…