Not sure where I found these but they definitely were scrounged off the net, just no idea where from so I hope there are no issues.The colour of the 'leatherette' was somewhere between Emerald Green and Bottle Green - from my memory going back to the 1960s, when some of the old trains and buses were still in service !
The information was published in an article in Scale Aircraft Modelling magazine, when the 'Matchbox' Halifax kit was first released in the early 1980's, and confirmed to me by a neighbour (now deceased) who flew Halifaxes.
These are from a Lancaster but I think would be fairly representative