There are several antonyms for the word "art consonant", which refers to the harmonious combination of colors, shapes, and patterns in visual arts. One antonym is "ugly", which represents the opposite of beauty or aesthetic value. Another antonym is "discordant", which suggests a lack of harmony or coherence in the artistic elements, such as clashing colors or irregular shapes. Other antonyms for "art consonant" include "chaotic", "irregular", and "unsightly", which all point to a negative quality or lack of aesthetic appeal. Therefore, it is important for artists to strive for art consonance in their works to convey a sense of harmony and beauty to the viewers.