Closest hex to #37aa0b is #3a1

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#
#3a1

37aa0b

37aa0b

contains 3a

03a 13a 23a 33a 3a0 3a1 3a2 3a3 3a4 3a5 3a6 3a7 3a8 3a9 3aa 3ab 3ac 3ad 3ae 3af 43a 53a 63a 73a 83a 93a a3a b3a c3a d3a e3a f3a

contains a1

0a1 1a1 2a1 3a1 4a1 5a1 6a1 7a1 8a1 9a1 a10 a11 a12 a13 a14 a15 a16 a17 a18 a19 a1a a1b a1c a1d a1e a1f aa1 ba1 ca1 da1 ea1 fa1

contains 31

031 131 231 310 311 312 313 314 315 316 317 318 319 31a 31b 31c 31d 31e 31f 331 431 531 631 731 831 931 a31 b31 c31 d31 e31 f31