Closest hex to #c03b31 is #b33

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#b33

c03b31

c03b31

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 33

033 133 233 330 331 332 333 334 335 336 337 338 339 33a 33b 33c 33d 33e 33f 433 533 633 733 833 933 a33 b33 c33 d33 e33 f33

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