Thanks Rick, I based the Voss colors on a discussion on the Aerodrome with Dan San and Taz, seems they both agreed that it was a bleached linen color, that's what gave it the silvery gray appearance (How Mc Cudden described it anyway). Supposedly only the 3 F triplanes used this fabric, later ones were clear doped linen or a few did have the overall turquoise color under the streaks.
Dave