The leaves are birch leaves and their shape is long and thin with a pointy end. Their coloration is a light green on the top with a white underside. The branches each have thin, long stems that are the attachment point for the leaves. There are also small, brownish-black berries that can be found growing in clusters. I would recommend coloring the leaves in a light green, with a few shades of white as highlights on the underside and stem. The stem can be a dark brown, and the berries can be a deep brownish-black. To bring out the details, use a thin black or dark brown outline on the leaves and berries. Add some highlights to the stems with a hint of lighter green, and the overall effect would be beautiful.