You use harlequin to describe something that has a lot of different colours, often in a diamond pattern.
[written]
...the striking harlequin floor.
Synonyms: colourful, rainbow, psychedelic, variegated More Synonyms of harlequin
harlequin in British English
(ˈhɑːlɪkwɪn)
noun
1. (sometimes capital) theatre
a stock comic character originating in the commedia dell'arte; the foppish lover of Columbine in the English harlequinade. He is usually represented in diamond-patterned multicoloured tights, wearing a black mask
2.
a clown or buffoon
adjective
3.
varied in colour or decoration
4.
(of certain animals) having a white coat with irregular patches of black or other dark colour
harlequin Great Dane
5.
comic; ludicrous
Word origin
C16: from Old French Herlequin, Hellequin leader of band of demon horsemen, perhaps from Middle English Herle king (unattested) King Herle, mythical being identified with Woden
Harlequin in American English
(ˈhɑrlɪkwɪn; ˈhɑrlɪkɪn)
noun
1.
a traditional comic character in pantomime, who wears a mask and spangled, diamond-patterned tights of many colors and sometimes carries a wooden wand or sword
2. [h-]
a clown; buffoon
adjective [h-]
3.
comic; ludicrous
4.
of many colors; colorful
Word origin
Fr harlequin, arlequin < OFr hierlekin, hellequin, demon: Fr sense & form infl. by It arlecchino < same OFr source