Closest hex to #51313f is #534

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#534

51313f

51313f

contains 53

053 153 253 353 453 530 531 532 533 534 535 536 537 538 539 53a 53b 53c 53d 53e 53f 553 653 753 853 953 a53 b53 c53 d53 e53 f53

contains 34

034 134 234 334 340 341 342 343 344 345 346 347 348 349 34a 34b 34c 34d 34e 34f 434 534 634 734 834 934 a34 b34 c34 d34 e34 f34

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