To say that Qing means 'blue-green' is sort of a half translation. The true meaning seems even more appealing to me, because it means something like 'the color of things in nature'. For example, the color of the leaves on a tree would be the theory of 'Qing' but a pair of man made green pants of the exact same shade would not be Qing. It's a really beautiful word, and I think it would make a nice name!
It can be used as a boy's name. It means clear water. In Chinese, Qing can be written into different words. My boyfriend is named Zhang Ze Qing, a really wonderful name.
https://en.m.wiktionary.org/wiki/%E6%B8%85
https://www.infocina.net/dizionario