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(x-color-values "black") ⇒ (0 0 0) (x-color-values "white") ⇒ (65280 65280 65280) (x-color-values "red") ⇒ (65280 0 0) (x-color-values "pink") ⇒ (65280 49152 51968) (x-color-values "hungry") ⇒ nil
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