Here are a couple of very quick and simple Christmas cards that are easy to produce on mass. They are also very easy to adapt to whatever colours you like, or more importantly, have in your stash!
I've chosen two shades of pink, Pretty in Pink and Melon Mambo, and two shades of blue, Baja Breeze and Marina Mist. The rest of the card is very straightforward. Again, you can adapt it easily by using whichever border punch you have.