Closest hex to #1d3000 is #230

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#
#230

1d3000

1d3000

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 30

030 130 230 300 301 302 303 304 305 306 307 308 309 30a 30b 30c 30d 30e 30f 330 430 530 630 730 830 930 a30 b30 c30 d30 e30 f30

contains 20

020 120 200 201 202 203 204 205 206 207 208 209 20a 20b 20c 20d 20e 20f 220 320 420 520 620 720 820 920 a20 b20 c20 d20 e20 f20