Closest hex to #638370 is #687

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#687

638370

638370

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 87

087 187 287 387 487 587 687 787 870 871 872 873 874 875 876 877 878 879 87a 87b 87c 87d 87e 87f 887 987 a87 b87 c87 d87 e87 f87

contains 67

067 167 267 367 467 567 667 670 671 672 673 674 675 676 677 678 679 67a 67b 67c 67d 67e 67f 767 867 967 a67 b67 c67 d67 e67 f67