As it turns out, the word "hueful" is quite unique and rare, making it difficult to find direct synonyms. However, there are several other expressions that convey a similar sense of vibrancy, colorfulness, or liveliness. Phrases such as "color-rich", "vividly hued", "brightly colored", "multicolored" or "brilliantly diverse" can effectively capture the essence of hueful. Alternatively, one might employ terms such as "variegated", "rainbow-like" or "colorful spectrum" to describe something that possesses a wide range of hues. Although no exact synonyms for "hueful" exist, these suggestions should assist in expressing the concept of being richly colorful and visually striking.