Closest hex to #66aa66 is #6a6

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#
#6a6

66aa66

66aa66

contains 6a

06a 16a 26a 36a 46a 56a 66a 6a0 6a1 6a2 6a3 6a4 6a5 6a6 6a7 6a8 6a9 6aa 6ab 6ac 6ad 6ae 6af 76a 86a 96a a6a b6a c6a d6a e6a f6a

contains a6

0a6 1a6 2a6 3a6 4a6 5a6 6a6 7a6 8a6 9a6 a60 a61 a62 a63 a64 a65 a66 a67 a68 a69 a6a a6b a6c a6d a6e a6f aa6 ba6 ca6 da6 ea6 fa6

contains 66

066 166 266 366 466 566 660 661 662 663 664 665 666 667 668 669 66a 66b 66c 66d 66e 66f 766 866 966 a66 b66 c66 d66 e66 f66