Closest hex to #ccccaa is #cca

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#
#cca

ccccaa

ccccaa

contains cc

0cc 1cc 2cc 3cc 4cc 5cc 6cc 7cc 8cc 9cc acc bcc cc0 cc1 cc2 cc3 cc4 cc5 cc6 cc7 cc8 cc9 cca ccb ccc ccd cce ccf dcc ecc fcc

contains ca

0ca 1ca 2ca 3ca 4ca 5ca 6ca 7ca 8ca 9ca aca bca ca0 ca1 ca2 ca3 ca4 ca5 ca6 ca7 ca8 ca9 caa cab cac cad cae caf cca dca eca fca

contains ca

0ca 1ca 2ca 3ca 4ca 5ca 6ca 7ca 8ca 9ca aca bca ca0 ca1 ca2 ca3 ca4 ca5 ca6 ca7 ca8 ca9 caa cab cac cad cae caf cca dca eca fca