I had to verify it all by myself, but i did it.
Gray 7290908011B1 is light gray
Ash Brown 7290908011E0 is brownish
MD Gray 7290908011B2 is dark gray, which is the one I needed.
I found out by searching each part number on the web and seeing which color popped up.
I've ordered it from a Toyota dealership and I am still waiting for it.