Flaxen-haired refers to hair that is pale yellow, resembling the color of flax. Antonyms for this word may include hair colors such as brunette, black, or red. These colors are considerably darker than flaxen hair and may have different undertones or shades. Other antonyms for flaxen-haired could be words that describe hair texture, such as curly, frizzy, or straight. These words describe the physical appearance of hair rather than its color. While flaxen-haired may be considered an attractive trait, these antonyms offer a range of options for describing hair that is different in color or texture.