Navy blue and vermilion red are complementary colors that can create a striking visual contrast. To pair pictures, you can use navy blue as the primary color for one element (e.g., the background) and vermilion red for another (e.g., the subject or highlights). This color scheme works well in graphic design, photography, and fashion to draw attention and evoke a sense of energy and boldness. It's important to maintain a balance in the composition to prevent the image from becoming too jarring. Consider the mood you want to convey and adjust the intensity and placement of the colors accordingly.