You can add that romantic, wintry twist by using white on white, perhaps with a hint of sparkle for that frosty feel. Keep it all white or add subtle greens such as grey spruce, eucalyptus, sage or cineraria if you wish, or even icy blues or pastels such as pale lilac can bring a subtle hint of colour. Unless a traditional Christmas feel is what you want, I'd suggest avoiding reds, greens and tartans. An alternative would be a rustic, fireside feel, which can be achieved by using cinnamon sticks, twigs and pine cones, perhaps with hint of metallics and colours such as deep reds, burnt orange and dark spruce on Kraft or corrugated Kraft card. Favours for each style can come from mini crackers or gift boxes decorated according to your chosen theme with place cards slotted into pine cones, sprayed or painted white, tipped with snow, or left natural.