Closest hex to #1e3688 is #238

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#
#238

1e3688

1e3688

contains 23

023 123 223 230 231 232 233 234 235 236 237 238 239 23a 23b 23c 23d 23e 23f 323 423 523 623 723 823 923 a23 b23 c23 d23 e23 f23

contains 38

038 138 238 338 380 381 382 383 384 385 386 387 388 389 38a 38b 38c 38d 38e 38f 438 538 638 738 838 938 a38 b38 c38 d38 e38 f38

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