What colour of green food colouring do people use to get the perfect colour for leaves of roses?
I'll sometimes use a combo of Wilton's Leaf Green and Moss Green. It depends on how deep or dark you want the color. If you want it really dark...I'd use just Moss Green.
I use what Alan Dunn does. I have a jar made up with his dark green mixture. This is touch of nutmeg brown, full tub of jade and moss. When I dust the rose leaves, I dust some of the edges with red, then the green mixture on the front of the leave, moss only on the back.
Hope this helps.