Hmm I saw the exact same message today.
I don't know why people bother to sell recipes as a quick browse around the forum should get you the answer.
I know I know, not every player reads the forums.
But a quick google search or something would get it.
Looks like it has some silver in there, and blue. Don't know if there's green involved, but possibly a Blue/Blue/Silver/Green type mix. Unfortunately, Silver dye isn't super cheap to play around with, but it should be easy to discover with a few trials.