Here's what the finished print looks like. I added my signature stamp to the back.
I got out my colored pencils, mostly Prismacolor and sharpened them up. I'm putting a green all over the tree first - "Grass Green", then highlighting with some blue-greens "Aqua Green" and "Parrot Green" and a yellow-green "Chartreuse". The 'lights' on the tree are "Canary Yellow".
Dang...the "Grass Green" keeps breaking off... I don't know if it will last through all the trees.
Here's the finished card.