Closest hex to #66bb99 is #6b9

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#6b9

66bb99

66bb99

contains 6b

06b 16b 26b 36b 46b 56b 66b 6b0 6b1 6b2 6b3 6b4 6b5 6b6 6b7 6b8 6b9 6ba 6bb 6bc 6bd 6be 6bf 76b 86b 96b a6b b6b c6b d6b e6b f6b

contains b9

0b9 1b9 2b9 3b9 4b9 5b9 6b9 7b9 8b9 9b9 ab9 b90 b91 b92 b93 b94 b95 b96 b97 b98 b99 b9a b9b b9c b9d b9e b9f bb9 cb9 db9 eb9 fb9

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