One of the comments on that page mentions that we see the G-class stars like the Sun as "yellowish", but in fact they are white, like a LED lamp with a color temperature of 5500 K or 6000 K.

The reason for this is not mentioned there, which is that the atmosphere of the Earth acts like a low-pass filter for the direct light that comes from the Sun or from a star, converting the white light into yellowish light. The missing bluish light is diffused over the sky, giving it its blue color. The night sky is also blue, but at a many times lower luminance, so that it seems black.

On the Moon, the Sun will appear as perfectly white, on a perfectly black sky.