Hello Dave,
I'll take a guess at these colors. From left to right, top row first.
RNAS Khaki A
Admiralty Gray or Metal Gray or RNAS Dyed Spirits/Varnish
PC10 1916
Early Dyed Spirits Brown
RNAS Khaki (faded)
PC10 1918
Manders Red-Brown
RNAS Khaki B
Cheers,
Rufe