idiom · A profusion of colors, typically referring to a garden or spring scene with many blooming flowers.

春天到了，花园里万紫千红，景色迷人。

idiom · A figurative description of a scene of prosperity, variety, or a profusion of flourishing activities and trades.

当前的艺术舞台呈现出一派万紫千红的繁荣景象。