Closest hex to #1d1d2c is #223

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#223

1d1d2c

1d1d2c

contains 22

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contains 23

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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