I do agree that old photos "wash out" when over exposed like that. However, simply over-exposing 2 separate shades can make them both become the same color on film (aka white here).
You can't necessarily rule out a color's existence when this happens.
To better see the colors you need to lower the exposure, something you can't do after-the-fact. Looking at the pic twin-tail posted, the photo exposure is much more limited, and you can see on the side of the tail there are 2 colors at work.
Here's something to show what I'm seeing:
It
is possible this is also "washout" but unlikely as I see it because the color is constant (on the photo, specifically, not the airplane) around the curve of the tail up to and including the fillet. If it were only washout, it would dim and fade as the angle of the tail's curved surface bounced light in other directions, but it stays steady.
That's why I say it looks like there's white at play, and not just over-exposed film.