Closest hex to #183a68 is #136

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#136

183a68

183a68

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 36

036 136 236 336 360 361 362 363 364 365 366 367 368 369 36a 36b 36c 36d 36e 36f 436 536 636 736 836 936 a36 b36 c36 d36 e36 f36

contains 16

016 116 160 161 162 163 164 165 166 167 168 169 16a 16b 16c 16d 16e 16f 216 316 416 516 616 716 816 916 a16 b16 c16 d16 e16 f16