Closest hex to #66aa99 is #6a9

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#
#6a9

66aa99

66aa99

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 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 69

069 169 269 369 469 569 669 690 691 692 693 694 695 696 697 698 699 69a 69b 69c 69d 69e 69f 769 869 969 a69 b69 c69 d69 e69 f69