Hello Liam,
welcome on the Forum. About the colour of the names and numbers they were green. Here under is the memories of Jean-René CHAMPION, the driver of the Sherman MORT-HOMME, who was at the origine of the green color of the numbers and names.
Best regards
Laurent (Larry) Fournier
Jean René Champion driver of MORT-HOMME
My tank was baptized "Mort-Homme" and was given the number 36. Mort-Homme was the site of vicious fighting in 1916 between French and German forces. Other tanks in the company bore such famous names as Argonne, Marne, Vimy, and Douaumont, and each tank had its own identifying number. "Mort-Homme" means "dead man" in French. I don't recall that either I or any of my crew-members saw in that name an omen of possible dire things to befall us. In keeping with my reputation in the company as an "artist" I was assigned the task, by my platoon commander, of painting the names, numbers, and other required identifiers on the five tanks of the platoon. The names went on the sides of the tank body in large light khaki letters which I bordered in white and the numbers in the same color scheme on the sides of the turrets. Since my platoon, designated the 1st Platoon, was the first one to be adorned with the regulation symbols, Captain Branet, after having viewed and approved my handiwork, ordered the other platoons of the company to follow the same lettering and color scheme. Needless to say I found myself involved in far more "signpainting" than I would have preferred. Our main job, however, was not to adorn and decorate but to become intimately knowledgeable about our equipment and to learn how to operate it in conjunction with other elements of the company, of the regiment, and of the division. We threw ourselves into that task with enthusiasm.