Color Field Paintings were Pipular in What Decades.
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1950's - 1960's

Explanation:

Color-field painting is a style of abstract painting that emerged in New York City during the 1950s and 1960s. Inspired by European modernism and closely related to abstract expressionism, many of its notable early proponents were among the pioneering abstract expressionists.

pitch- the definition of pitch is as follows:

"the quality of a sound governed by the rate of vibrations producing it; the degree of highness or lowness of a tone."