Throughout the TV series Babylon 5, we hear about different sections of the eponymous space station referred to by colours and numbers, e.g. "Green Two" or "Grey Seventeen". These two parts of the classification system seem to be orthogonal: e.g. in the episode "Ceremonies of Light and Dark" in S3, a call is traced to the Green sector and also found to be from level 14, after which they know it comes from Green Fourteen.
I love a good bit of worldbuilding, especially detailed maps of imaginary places. Is it ever explained, perhaps in supplementary materials to the show, exactly how the different "sectors" and "levels" are organised? Is there a canonical map of Babylon 5 showing all the coloured and numbered regions?