Art indecorous, meaning something lacking in taste or propriety, has several antonyms that denote refinement, appropriateness, or elegance. One of the antonyms for art indecorous is tasteful, which refers to something that is done in good taste and aesthetically pleasing. Another antonym for art indecorous is refined, which connotes sophistication, elegance, and gentility. The term appropriate is another antonym for art indecorous, which suggests something is suitable or fitting for a particular occasion or purpose. Finally, the word decorous is a direct antonym of art indecorous, meaning to show proper manners, conduct or etiquette. Together, the range of antonyms for art indecorous depicts a spectrum of class, refinement and style.