Thanks forthe comments Guys.
M Blakey - There are no blues on these figures. The overcoat on Reverend Smith is black. I tried to lighten with Vallejo Grey Green to show the coat fading into a green colour but it didn't work!!
The blues on the Dalton and Artillery figures is Americana Deep Midnight Blue mixed with black for the first coart, then the blue on its own for the second and a final highlight of blue mixed with a very tiny amount of Vallejo Iraqi Sand.
Thanks again
Andy