
What color is the Sun? An astrophysicist answers
Some say that the Sun is a green-yellow color, but our human eyes see it as white, or yellow-to-red during sunset. What color is it really?

Buried inside this absurd claim — and make no mistake, it is absurd — is a tiny kernel of truth: that the Sun contains a greater intensity of “green light” photons, or the quantum particles that compose light, than of any other wavelength or color. But simply having a wavelength peak in the spectrum of your light, or a maximum intensity at a given frequency, or a larger number of photons over a particular color range, isn’t enough to determine what color an object, even an object like the Sun, is in reality. The Sun, just as your eyes tell you, really is a white-light star, as the simplest experiment of all can reveal.
But the reason people give to justify the statement that “stars are green” is fundamentally flawed, as “wavelength peak” has very, very little to do with what the intrinsic color of an object or an aggregate form of light actually is. The two ideas of “wavelength” and “color” can only be used interchangeably where purely monochromatic light is present.