Hardly any photos are known of these aircraft in RNlNAS service.
The aircraft were rather dark, most probable the standard RNAS paint scheme. This was a black anti-fouling" on the hull.
Other parts were painted with copal-varnish.
From mid 1916 the aircraft of the RNAS were camouflaged, upper surfaces of wings, fuselage, etc. were khaki.

Scheme Colour name FS-nummer BS-nummer Humbrol XtraColor Vallejo Model Color Vallejo Model Air
Standard #1 Underside Fuselage Black - Dark brown ~7038   33   70.950  
Remaining parts of aircraft Khaki or olive green     179        179

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

 

Felixstowe-F2A-small
(Possible) Colour scheme Felixstowe F2A.