Closest hex to #551133 is #513

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#513

551133

551133

contains 51

051 151 251 351 451 510 511 512 513 514 515 516 517 518 519 51a 51b 51c 51d 51e 51f 551 651 751 851 951 a51 b51 c51 d51 e51 f51

contains 13

013 113 130 131 132 133 134 135 136 137 138 139 13a 13b 13c 13d 13e 13f 213 313 413 513 613 713 813 913 a13 b13 c13 d13 e13 f13

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