When built in the late 40s, they were the same dark green as used on carriages and buses, and to be seen today on "Maedb" in Cultra. They were lined in the same style, in black and white. Numbers (1000-4) and "snails" were the lighter green "eau-de-nil".
Some at least, maybe all, were repainted in the lighter green at some stage in the mid 50s, at which stage (1958) they were designated as "D" class. Next up was full Black and Tan, post 1962. Later, all black, same as most (but not all) "E"'s. In at least one case, the white flashes on the upper part of the ends were vertical black and white stripes rather than plain white. None carried the version of Black and Tan with the small band of tan low on the body sides, like the A and C classes did. Any pictures I've seen of BnT on the D class had the full width tan, i.e. in the same proportion as carriages.