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But if there’s a little bit more ambient lighting, colors look washed out, or low in chroma.

The Watts Towers aim to split the sky into chroma, spires tiled with rubble nothing less than aspiration.

Acid-green projected light — known as chroma green, used by film studios for “green screen” effects — bathes the big gallery off the rotunda.

First there was Robert Musil the mechanical engineer, who invented a chroma meter, a device for evaluating color.

In their variety of chroma and brushwork, they vigorously explore different tensions between the flanking planes of color and the tangles of line between them.