Desmond Coakham’s book on the BCDR states, “We may complain about the painting style (carried out at the York Road Works) of No.30 that now reposes in the Ulster Folk & Transport Museum. The green is wrong and the company initials were not carried after ‘Invisible Green’ was given up,”
It seems the greens used on the BCDR were ‘Indivisible Green’ almost black in colour followed from 1937 by a dark Olive Green.
In the pursuit of accurate railways colours who knows where the truth lies.