Again wnet through the net and found these shots... please notice the different colour of the camo spot at the fuselage side just below the cockpit that seems to be similar to the one used for patches. However the first B&W image of the post #5815 suggests two different colours. The one used for patches is undoubtedly lighter. I would say the Sky S-type/Duck Egg Blue could be or the grey that was used for RAF code letters as well.
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