It depends on the film type and the lighting. Two different pics of the same two birds (I'll show them below) almost seem to have the tail stripe different colors, on what is obviously the same two aircraft and possibly even taken on the same day, but from different angles and probably on different rolls of film.
They look like a dark, orangey-yellow in this one-

And almost white on these two-


The white rudder and yellow tail stripe on White 7 almost appear to be the same color in the top photo, but obviously aren't in this one-

Confused yet?

Plus the blurrier pics, mostly the ones from Dan Melinte's collection, are stills from a wartime film, while the others are regular photos.