I could not establish accurately the original color of the "Telégrafo I".
But if I coincide with you in affirming that definitively the color was not silver.
The first military airplane in Venezuela was also a Hanriot Macchi.
In the Venezuelan case, it is commonly accepted that the airplane brought by Rennella, was colored of green. Mainly for the reference of a visual witness that leave a written book.
It is possible that that it is the case of the Ecuadorian airplane.
It is more, if you detail the picture, observes that the clear line colored the Italian flag (with the white to the center).
With the Ecuadorian flag, the darkest color would go to the center. (Blue)
If you observe but attentively, they noticed that the Italian flag seems still to be painted, in the inferior part of the superior wing plane, of the airplane.
These pilots acquired these airplanes of the inventories of the Italian aviation, for what the color could settle down, as the same one that was normalized in Italy for that date.
Waiting to have contributed in something.
Dario