Closest hex to #253919 is #231

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#
#231

253919

253919

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 31

031 131 231 310 311 312 313 314 315 316 317 318 319 31a 31b 31c 31d 31e 31f 331 431 531 631 731 831 931 a31 b31 c31 d31 e31 f31

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