Warm grey usually designates a browner grey, where as cool greys ar ethe green/blue greys. I already find Grey to be bluish and Dark Grey to be more green so Warm Grey would be just grey or a bronzer grey.
Note in Obs pic how the lens looks bronze. I thought it was a fade lens or bad printing when I saw it first.
Now that I thought about it more, it's one thing to show an Oil Drum with an odd icon, but to show a Twitch in advertising that everyone who's seen it will want, why not release it? Maybe it'll be the polar option or the early summer late commer to the line.
I can see the little icons remaining too. Dragon used to place a small D on the end of each stem.