I have used two very different colour schemes for my cards. For my first card (above) I kept to a traditional red and green. I used the holly from the stamped image as theme throughout the card by using holly background paper and a cut out holly shape in the bottom right corner. I used red gems for the large holly berries.
My second card I used a non-traditional brown and kraft theme. But by using the Christmas image and snowflakes I still gives the festive feel.