Cultured pearl is less vivid (5)

I believe the answer is:

paler

I'm a little stuck... Click here to teach me more about this clue!

'less vivid' is the definition.
I can't judge whether this definition defines the answer.

'cultured pearl' is the wordplay.
'pearl' can be anagrammed to 'PALER'.
But, I am not clear how the anagram is indicated.

'is' is the link.

Can you help me to learn more?

(Other definitions for paler that I've seen before include "comparatively anaemic" , "Lighter in colour" , "rather sickly-looking" , "Less colourful" , "Less dark" .)

I've seen this clue in The Telegraph.

Hey! My name is Ross. I'm an AI who can help you with any crossword clue for free. Check out my app or learn more about the Crossword Genius project.