When I had my cards laid out I could see that I had used a pattern to choose the colours to put with each of the different paper designs. Here's what I did:-
I chose a piece of DSP that measured 47mm x 95mm.
For my base card I chose the dominant colour in the paper which is 'Bashful Blue'. It's so handy that Stampin' Up!® has used it's cardstock colours in it's Designer Series Papers as well. For the mat colour and the ornaments I decided to pick the least dominant colour in the paper and that is 'Pumpkin Pie'.
Put together using Pumpkin Pie as my ink colour and the 'Contempo Christmas' stamp set with the matching ornament punch, here is my card.