While Christmas cards should use some of the classic images of the season, they don't need to be boring or plain. This graphic uses a sharp set of triangles to create a colorful Christmas tree.
It's a somewhat futuristic graphic, and the triangles jut out in clean points for an asymmetrical look. There's plenty of variety in the colors, and a thin white outline runs through some of the triangles to develop the shape of the tree. This is a modern take on a classic holiday greeting, and the computerized font at the bottom of the page completes the effect.