Dark blue is a shade of blue that is darker than navy blue and lighter than midnight blue. It is often used in design to convey a sense of calmness and depth. When combining dark blue with pictures, it is important to consider the color contrast and composition to ensure that the images are easily visible and harmonize with the color scheme. In design, dark blue can enhance the mood of a piece and make the pictures stand out. No specific information is available on 'deep blue pairing pictures' as a subject in itself.