Closest hex to #aabb33 is #ab3

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#
#ab3

aabb33

aabb33

contains ab

0ab 1ab 2ab 3ab 4ab 5ab 6ab 7ab 8ab 9ab aab ab0 ab1 ab2 ab3 ab4 ab5 ab6 ab7 ab8 ab9 aba abb abc abd abe abf bab cab dab eab fab

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 a3

0a3 1a3 2a3 3a3 4a3 5a3 6a3 7a3 8a3 9a3 a30 a31 a32 a33 a34 a35 a36 a37 a38 a39 a3a a3b a3c a3d a3e a3f aa3 ba3 ca3 da3 ea3 fa3