SC
The Cucumber Sandwich was in fact the third livery and certainly a retrograde step from the British Racing Green used in livery #2; which was a BRG stripe and tail with a globe in the centre of the tail. This was introduced on the DC6/6B and the Electra. Livery #1 which lasted till the early 60's was also better than the cucumber, largely white and silver with a few brushes of blue or gold and a globe in a speedbird on the tail.
God knows who thought up the cucumber but I think they got the contract on the Headland...