Closest hex to #1c8991 is #289

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#
#289

1c8991

1c8991

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

contains 89

089 189 289 389 489 589 689 789 889 890 891 892 893 894 895 896 897 898 899 89a 89b 89c 89d 89e 89f 989 a89 b89 c89 d89 e89 f89

contains 29

029 129 229 290 291 292 293 294 295 296 297 298 299 29a 29b 29c 29d 29e 29f 329 429 529 629 729 829 929 a29 b29 c29 d29 e29 f29