I’ll take a guess and say pewter. I don’t know though, let’s see what the experienced peeps think.
What’s the pairing it came from… wild guessing won’t help you. It does look like a pewter… i don’t see yb.
My pewter yb for comparison.
pairing：pewter and yb pastel
I bought it as Yb pewter, but I can’t see YB, so I want to consult