Dark navy is a slightly softer alternative to black while maintaining the formality and respect that the occasion requires. Navy dresses work particularly well in daylight services or in warmer months when pure black can feel heavy. The darkness of the navy is key because pale navy would feel too casual. Look for a simple cut without embellishment or pattern. The neckline should be straightforward and the sleeves should be either long or completely absent depending on the occasion. Navy dresses prove that you can move away from black while staying completely appropriate and respectful. These are the dark navy dresses that work because they respect the occasion while offering a slightly warmer alternative.