To me this mask looks super Green or maybe Turquoise, but it's definitely not "blue".

Yeah, that definitely doesn't look blue to me.

There isn't a "Green" version already, so just rename? Unless there's some reason a green coloured mask is called "Blue"?

Wow, such blue...

Maybe the culture it came from doesn't recognize the color green and groups it in with blue (like many older tribes/cultures did) that's probably not the answer but it could make sense if they wanted to argue that point heh

That's a lot of green for a blue item. Yay, Subeta consistency.