"彩色" 的英语表达是 "colorful".
来源：这个词来自英语 "color", 它的意思是 "颜色".
例句：
The sky was so colorful after the rain.
(雨后的天空是如此美丽多彩。)
She loves to wear colorful clothes to express her personapty.
(她喜欢穿五颜六色的衣服，以展现她的个性。)
The festival was full of colorful decorations and pghts.
(节日上有着丰富多彩的装饰和灯光。)