Closest hex to #12a39b is #1a9

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#
#1a9

12a39b

12a39b

contains 1a

01a 11a 1a0 1a1 1a2 1a3 1a4 1a5 1a6 1a7 1a8 1a9 1aa 1ab 1ac 1ad 1ae 1af 21a 31a 41a 51a 61a 71a 81a 91a a1a b1a c1a d1a e1a f1a

contains a9

0a9 1a9 2a9 3a9 4a9 5a9 6a9 7a9 8a9 9a9 a90 a91 a92 a93 a94 a95 a96 a97 a98 a99 a9a a9b a9c a9d a9e a9f aa9 ba9 ca9 da9 ea9 fa9

contains 19

019 119 190 191 192 193 194 195 196 197 198 199 19a 19b 19c 19d 19e 19f 219 319 419 519 619 719 819 919 a19 b19 c19 d19 e19 f19