So also with water vapor and various other small partkel like dust, soot powder and sarik salt intake coming from the ocean. As we have seen in volcanic eruptions it can also deliver various dust particles in the atmosphere as well as pollution that causes the addition of dust and gas in the atmosphere.
If we talk about light and solar waves it is a color produced by that light depending on the wavelength and frequency. Basically the light moves in a straight line unless there is a disturbing gas molecule like shape, dust or other.
Therefore, the setting sun has different colors from orange to reddish color. This is because the wavelength is blue and hi much shorter than red and orange waves.