What does the cryptic crossword clue "Harmonise colours in riotous decoration (10)" mean?

The definition is "Harmonise". The wordplay uses an anagram. anagram of DECORATION = COORDINATE; definition: "Harmonise" The answer is COORDINATE.

Harmonise colours in riotous decoration (10)

Independent Cryptic #11703 | 3 Down | 2024-04-13 flower