Guǎnggào pái shàng huāhuālǜlǜ de túpiàn xīyǐn le bùshǎo lùrén.
The colorful pictures on the billboard attracted many passers-by.
Tips
usage
Often slightly negative or teasing — describes something visually loud rather than tastefully colorful. Use 五颜六色 for a neutrally positive 'many-colored'.
memory
花 (flower) reduplicated + 绿 (green) reduplicated — literally 'flower-flower green-green', the image of a flowerbed in full bloom.
