Vividity, or the quality of being bright, vivid, or lively, is a word that can be difficult to find an exact antonym for. However, some words that could be considered to be antonyms or opposites of vividity include dullness, blandness, monotony, and flatness. Other antonyms could include darkness, dreariness, somberness, and lifelessness. While these words may not directly oppose the meaning of vividity, they do represent the opposite qualities that could be associated with the word. Ultimately, the best antonym for vividity will depend on the context in which it is being used, as well as the desired tone or effect.