Blue, green, and everything in between! This is pretty common in natural human languages. See this wiki page for more info: https://en.wikipedia.org/wiki/Blue%E2%80%93green_distinction_in_language
This sentence looks very idiomatic of the western world. I know the world of a Song of Fire and Ice is highly confluent with ours, but I expected more creativity from DJP.
This sentence doesn't have anything to do with DJP. It is just a sentence to teach the language. Interpret it literally, any idiom is coming from inference.
I entered "my blood is green" and it was accepted, so Vulcans are included too :)
Good point Eromeon. Let us all know when you have created a language as full and intricate as High Valyrian, and we'll compare notes. I'm sure you have the philological expertise to back up your smack talk about an actual linguist.