Closest hex to #1f2b57 is #235

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#
#235

1f2b57

1f2b57

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 35

035 135 235 335 350 351 352 353 354 355 356 357 358 359 35a 35b 35c 35d 35e 35f 435 535 635 735 835 935 a35 b35 c35 d35 e35 f35

contains 25

025 125 225 250 251 252 253 254 255 256 257 258 259 25a 25b 25c 25d 25e 25f 325 425 525 625 725 825 925 a25 b25 c25 d25 e25 f25