Mike, That is the only photograph of the ship that I have showing that paint scheme. It shows Legion leaving her builders in December 1940.

A doctored version of it, lightened and with fake bow wave etc, giving the appearance that she is at sea at speed, appeared in both Edgar March’s ‘British Destroyers’ and Peter Smith’s ‘Fighting Flotilla’: #

As an aside, I am very doubtful that this is a simple dark grey/light grey scheme. To my mind the lightest paint is certainly not 507C given the contrast with the white draught marks. I have marked some demarcations (A & B) which would make it at least a three colour scheme: #

I think that the panel right at the bow, the bridge front and its upper sides, and the bottom rear of the funnel are all very dark, black or near black. There is probably more very dark further aft both on the superstructure and the hull. There seem to be three tones right at the extremity of what we can see of the hull right aft (C).

The design is too early to be a Leamington sea-going scheme and it is quite unlike any of the early war amateur ship’s staff schemes either. I suspect it might be one of the shipyard camouflage schemes of the time, designed to camouflage the ship whilst being built. If so it won’t have used RN paints. You would be looking at a palette of colours locally mixed by Hawthorn Leslie’s foreman of painters to match the industrial background of the shipyard. Typically these schemes used browns, greys and black or a very dark shade of grey-brown. They were normally painted out when the ship entered service.

# I’ve put images up on the other site you asked this question on.