Is colorful an idiom?

Like a ribbon hundreds of meters long floating on the ocean, "colorful" is an idiom, and all kinds of traditional handicrafts are filled with counters in shops, which are very beautiful: "Fluorescent dyes dye blue seawater into emerald green; A cultural temple fair in the Spring Festival. " The usage of structural joint idioms as predicates is rich and colorful. Source "Flying to the Pacific Ocean". Colorful xuà n lü du cü im: I explained that the colors are dazzling.