Blue is a cool color while orange is a warm color. To avoid unpleasant vibrations, avoid using in equal amounts. Enliven your dark blue with a splash of orange (or calm your orange with a dash of blue).
Dark shades of blue symbolize importance, confidence, power, intelligence, stability, unity, and conservatism. By adding some orange to your predominantly dark blue palette you introduce some warmth and energy that can keep your palette from being too stilted or overpowering.
You don't have to use these exact shades. Go a touch lighter or darker, or step one spot to the left or the right on the color wheel. These color combinations are just to help you find a suitable color palette using dark blue as the main component.


