I think the operative word here is "saturated". The Sun is so bright that it looks white. It could be that it is strongly reddened, but that saturation makes it look white.
Ann
APOD: The Iris Nebula in a Field of Dust (2014 Jun 24)
Re: APOD: The Iris Nebula in a Field of Dust (2014 Jun 24)
Color Commentator