Bluishness is a term used to describe something that has a blue or blueish tint. Synonyms for bluishness include azure, cerulean, cobalt, cyan, indigo, navy, and sapphire. These terms can refer to the deep, rich blue of the ocean or sky, or the lighter, more pastel blue of a springtime flower or piece of clothing. Using synonyms can add depth and variation to your writing, as well as help you to avoid repetition and monotony. By exploring different words for bluishness, you can more accurately and creatively express the shades and moods of things that are blue.