I mean, it really just tests arbitrary word usage. I have no fucking clue if turquoise is supposed to be "green" or "blue", it's turquoise!
UK Costco hotdogs are £1.50, which is not equal to $1.50, reflecting both its arbitrary nature and that UK purchasing power is weaker than the exchange rate would appear. (Computer books are a frequent offender here of having the same $ and £ prices)
More metrics, including sRGB, can be found on https://en.wikipedia.org/wiki/Turquoise_(color)