Closest hex to #556644 is #564

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#564

556644

556644

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 64

064 164 264 364 464 564 640 641 642 643 644 645 646 647 648 649 64a 64b 64c 64d 64e 64f 664 764 864 964 a64 b64 c64 d64 e64 f64

contains 54

054 154 254 354 454 540 541 542 543 544 545 546 547 548 549 54a 54b 54c 54d 54e 54f 554 654 754 854 954 a54 b54 c54 d54 e54 f54