Closest hex to #bb2b1b is #b32

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#b32

bb2b1b

bb2b1b

contains b3

0b3 1b3 2b3 3b3 4b3 5b3 6b3 7b3 8b3 9b3 ab3 b30 b31 b32 b33 b34 b35 b36 b37 b38 b39 b3a b3b b3c b3d b3e b3f bb3 cb3 db3 eb3 fb3

contains 32

032 132 232 320 321 322 323 324 325 326 327 328 329 32a 32b 32c 32d 32e 32f 332 432 532 632 732 832 932 a32 b32 c32 d32 e32 f32

contains b2

0b2 1b2 2b2 3b2 4b2 5b2 6b2 7b2 8b2 9b2 ab2 b20 b21 b22 b23 b24 b25 b26 b27 b28 b29 b2a b2b b2c b2d b2e b2f bb2 cb2 db2 eb2 fb2