Closest hex to #12353a is #133

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#133

12353a

12353a

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 33

033 133 233 330 331 332 333 334 335 336 337 338 339 33a 33b 33c 33d 33e 33f 433 533 633 733 833 933 a33 b33 c33 d33 e33 f33

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