Surprisingly, neither TFA or anyone in the comments linked to a photo of liquid oxygen. It's very obviously blue. The liquid air article on wikipedia doesn't h

Surprisingly, neither TFA or anyone in the comments linked to a photo of liquid oxygen. It's very obviously blue. The liquid air article on wikipedia doesn't have any photos. https://en.wikipedia.org/wiki/Liquid_oxygen https://en.wikipedia.org/wiki/Liquid_oxygen