Guys, I think I'm right on this one. Both L2driver's photo and the one I posted look like USN tri-color to me. The photo below, which probably was the one on which the goofy color profile in L2driver's post was based, also (if you look at a good print) appears to be USN dark sea blue / intermediate blue / white.

For what it's worth (which I concede isn't much), the folks who researched this AZModel kit decal sheet agree with me.

This would not be unprecedented. Nine Dauntlesses were also supplied to the RN for evaluation and appeared in this scheme. You also have to consider that the Travelers were built for the USN and diverted to Britain, not built for Britain and that, as a non-operational type, repainting may not have been a priority.
I'm not interested in persuading anybody and won't argue the point beyond this post, but I think the assumption of British camouflage is leading the OP astray. I'm not aware of any photo of a Royal Navy Traveler that clearly indicates British camo.
August
P.S., if we do assume a Brit camo scheme, I agree that it would most likely be Temperate Sea, although because this is a non-operational type, one would expect the undersides to be yellow. In other words the same scheme as applied to the Stinson Reliants that saw similar duty with the RN. However, the photo in L2driver's post, which was on orthochromatic film that makes yellow appear dark (see roundel), shows that the underside was not yellow.