Closest hex to #3f290d is #421

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#421

3f290d

3f290d

contains 42

042 142 242 342 420 421 422 423 424 425 426 427 428 429 42a 42b 42c 42d 42e 42f 442 542 642 742 842 942 a42 b42 c42 d42 e42 f42

contains 21

021 121 210 211 212 213 214 215 216 217 218 219 21a 21b 21c 21d 21e 21f 221 321 421 521 621 721 821 921 a21 b21 c21 d21 e21 f21

contains 41

041 141 241 341 410 411 412 413 414 415 416 417 418 419 41a 41b 41c 41d 41e 41f 441 541 641 741 841 941 a41 b41 c41 d41 e41 f41