What color is solid methane?

Is it blueish, perfect white or some other color? I am interested because some celestial bodies are said to be covered with methane ice.




Your question is not very specific. So the answer is **it depends.** Think of water as an analog. 


* Methane "snow" would be white. (Due to scattering of light).
* Solid methane under sufficient pressure would form a clear colorless solid.
* Methane "snow" (which would be on surface" of some celestial body) could be any color if contaminated by even small amounts of other hydrocarbons. A reddish color seems to be typical. See ref: <http://www.caltech.edu/news/astronomers-find-ice-and-possibly-methane-snow-white-distant-dwarf-planet-1714>


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