In the 12th century, two green-skinned children appeared in an English village, speaking an unknown language and eating only raw beans. One child perished, but the survivor learned English and revealed they hailed from "Saint Martin's Land," a sunless world.

My use of the Greek example was a bit lazy to be fair. However, the point wasn't to perpetuate the idea that they didn't refer to blue and especially not that they couldn't see blue (that's a ridiculous misinterpretation of the idea), but to point out that the way colours were referred to and used was different to the way we do it now. Most importantly that adjectives rather than nouns were commonly used when describing the colour of things. Even specific nouns tended to refer to different bits or perspectives of the "blue spectrum" as we now use it. The Greek noun for light blue could also refer to grey, for example. That was just because both were part of the range of hues they used that word to describe. Much like "blue" could mean both turquoise or a deep royal blue today. The point is that the modern understanding of what hues colour words relate to doesn't always relate directly to the hues they were related to in the past. Our colour language is now shaped around our understanding of the spectrum of light, which has shifted what colours we closely associate with each other. Either way, I accept that's probably less of an issue in this case. What is worth noting is that in the Suffolk dialect the word "green", especially when describing a person, generally means ill or sickly. If you add to that the fact that there are numerous parishes and villages with the suffix St Martin in Suffolk and the neighbouring counties and the upheaval caused by the Anarchy. You can easily get an interpretation of a local squire taking in 2 sickly children displaced from their home in the parish of St Martin's.