Closest hex to #cc5566 is #c56

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#c56

cc5566

cc5566

contains c5

0c5 1c5 2c5 3c5 4c5 5c5 6c5 7c5 8c5 9c5 ac5 bc5 c50 c51 c52 c53 c54 c55 c56 c57 c58 c59 c5a c5b c5c c5d c5e c5f cc5 dc5 ec5 fc5

contains 56

056 156 256 356 456 556 560 561 562 563 564 565 566 567 568 569 56a 56b 56c 56d 56e 56f 656 756 856 956 a56 b56 c56 d56 e56 f56

contains c6

0c6 1c6 2c6 3c6 4c6 5c6 6c6 7c6 8c6 9c6 ac6 bc6 c60 c61 c62 c63 c64 c65 c66 c67 c68 c69 c6a c6b c6c c6d c6e c6f cc6 dc6 ec6 fc6