Midnight blue is a deep, dark shade of blue that is often associated with the night sky. When it comes to finding synonyms for this color, there are a few options to consider. Navy blue is one possibility, as it is also a dark blue shade. Another similar color is indigo, which is slightly darker than midnight blue and has a hint of purple. Dark sapphire and deep blue are also options, as they both convey a rich, intense shade of blue. Finally, ink blue is a synonym for midnight blue that emphasizes the darkness and depth of the color. Whether you prefer the elegance of navy blue or the intensity of ink blue, there are plenty of synonyms to choose from when describing a shade of blue that is as striking as midnight.