palette
US /ˈpæl.ət/
UK /ˈpæl.ət/

1.
a thin board or slab on which an artist lays and mixes colors
:
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The artist squeezed tubes of paint onto her wooden palette.
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He cleaned his palette thoroughly after finishing the painting.
2.
the range of colors used by a particular artist or in a particular painting
:
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The painting featured a vibrant palette of blues and greens.
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Her artistic palette often includes earthy tones.