I have used different shades of both blue and red teamed with white:
I am entering my card into these challenges:
Seems A Little Sketchy - Sketch
Dilly Beans - Red, Blue and White
I have used a subtle patterned red paper for the background. I die-cut two squares from blue glitter cardstock from DCWV. The image is from Dilly Beans and has been coloured with copic markers. I also doodled around the edge of the circle with Distress Marker - Faded Jeans. I added a sentiment from Sans Designs and also doodled around that with the same distress marker. I made corner accents on the glitter cardstock using two differing sizes of red pearls.