Closest hex to #216a8c is #268

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#
#268

216a8c

216a8c

contains 26

026 126 226 260 261 262 263 264 265 266 267 268 269 26a 26b 26c 26d 26e 26f 326 426 526 626 726 826 926 a26 b26 c26 d26 e26 f26

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 28

028 128 228 280 281 282 283 284 285 286 287 288 289 28a 28b 28c 28d 28e 28f 328 428 528 628 728 828 928 a28 b28 c28 d28 e28 f28