It's very easy to do as there is a colour challenge archive on the blog, just browse through 2015 colour challenges and pick your favourite one and give it a Christmas makeover. I chose challenge #144: navy, sky blue and metallic gold.
I used a technique I found on the Internet to create a sentiment-background stamp. I used a lot of different stamps and arranged them on an acrylic block in the design I wanted before inking them all up and stamping onto some white card. I used the dark blue colour for this.
I have added the metallic gold by using a gel pen and then layering up on gold mirri card. The washi tape looks lighter than this is day light, it is probably a shade darker than sky blue, but I hope it will do. It looks a bit like a present, doesn't it? Apologies for the shadow on the photo, it was taken late last night.