Adjective

1. Possessing prominent and varied colors.
   • 1895, The Annual of the British School at Athens

     It was a colourful vase with red and white hoops on the lid, and red bands above and below the main frieze. These bands also carry a metope pattern in white of triple lines and blobs, which can just be distinguished on the photographs.

2. Interesting, multifaceted, energetic, distinctive.
   • 1. Profane, obscene, offensive (usually in the phrase colourful language).
        • 2002, news.bbc.co.uk

          Hussain celebrated reaching his ton with a gesture towards the media centre, pointing to the number three on the back of his shirt and offering some colourful language.