I've removed the centre piece and painted that lime green and painted the base raspberry, both acrylic paint. As I re-placed the centre piece, I didn't have to faff with painting around the edges of the centre piece! I've used a Uni Posca paint pen to add white dots around the tree and then added Viva Decor Glitter pen for dimension.
I placed the tree over a ribbon onto the card. I'd forgotten I had this ribbon, so that was a very happy find. I've finished off with a greeting.