The fuselage was overall PC10. This colour varied from dark green to brown [between Humbrol H179 to Humbrol H108]; the wings were clear doped linen.
The markings of the RNlAF at that time were orange balls. Visible wooden and metal parts were covered with OP7 varnish, which had a colour similar to PC10.

SchemeColour nameFS numberHumbrolXtraColorVallejo Model ColorVallejo Model Air
Standard #1Fuselage PC10 ~4086   X144 70.830?  
Wings Clear doped linen   121 X105 70.819  

Check www.paint4models.com for an extensive conversion table with lots of colour and paint systems.

Bristol F2B-1-SMALL
Scheme Bristol F2B: Standard RFC scheme. [note the cock is not applied on this image)