"Colourableness" refers to the quality or state of being able to be colored or vividly embellished. Synonyms for this word include "decorativeness", which conveys the ability to decorate or beautify through color, pattern, or design. Another term is "vibrancy", which denotes a bright and lively quality that captures attention. "Radiance" can also be used as a synonym, suggesting a brilliant or glowing effect that adds allure. Additionally, "ornamentation" can be employed to convey the act of adorning with color or embellishments. Lastly, the term "huefulness" can be used, indicating the abundance or richness of colors. These synonyms offer alternative ways to express the concept of colorfulness or the ability to enhance aesthetic appeal through various hues.