Closest hex to #668844 is #684

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#684

668844

668844

contains 68

068 168 268 368 468 568 668 680 681 682 683 684 685 686 687 688 689 68a 68b 68c 68d 68e 68f 768 868 968 a68 b68 c68 d68 e68 f68

contains 84

084 184 284 384 484 584 684 784 840 841 842 843 844 845 846 847 848 849 84a 84b 84c 84d 84e 84f 884 984 a84 b84 c84 d84 e84 f84

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