The first green livery would appear to have been a mid-green, somewhere between a Malachite green and a Brunswick green.  An aluminium waist band gave them "lining". Roofs were grey. Later the green was the standard DMU darker green, and yellow warning panels were added to the lower front end panels.  There were two different sizes of panels used.  79960/3 had small panels and 79961/2/4 had slightly larger panels.

Preservation
The two NNR examples ran for some years in Midland and Great Northern Railway brown livery before being restored to BR-style green with NN-prefixes to their numbers.  79962 ran for some years on the KWVLR in two-tone green and white, numbered 62, and 79964 ran from 1972 to the mid-1980s in German Federal red livery as 64.  Both vehicles were later restored in BR liveries.  When restored as E79962 in 1976, this vehicle was believed to be the first ex-BR diesel of any kind restored to its original livery.

79964 in it's red livery, at the Keighley & Worth Valley Railway on the 4th August 1979. Robert Frise.

79962 in its two-one green livery. Undated. Robert Frise Collection