To be honest, I wasn't trying to match any particular aircraft. Rather I was just after a color that I personally found appealing. As far as photographing color, light and viewing conditions are everything. Consider the following two photos of my SE5a taken on the same day, literally minutes apart (with the same digital SLR). The first was taken in morning sunlight and looks very brown indeed. The second was taken no more than 5 minutes later in the "open shade" of the pits and looks extremely dark. This is not primarily an issue of exposure. It's how the wavelengths of the light bouncing off the pigments affects what our eyes perceive.