Closest hex to #213da0 is #249

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#249

213da0

213da0

contains 24

024 124 224 240 241 242 243 244 245 246 247 248 249 24a 24b 24c 24d 24e 24f 324 424 524 624 724 824 924 a24 b24 c24 d24 e24 f24

contains 49

049 149 249 349 449 490 491 492 493 494 495 496 497 498 499 49a 49b 49c 49d 49e 49f 549 649 749 849 949 a49 b49 c49 d49 e49 f49

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