Closest hex to #66b357 is #6b5

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#6b5

66b357

66b357

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 b5

0b5 1b5 2b5 3b5 4b5 5b5 6b5 7b5 8b5 9b5 ab5 b50 b51 b52 b53 b54 b55 b56 b57 b58 b59 b5a b5b b5c b5d b5e b5f bb5 cb5 db5 eb5 fb5

contains 65

065 165 265 365 465 565 650 651 652 653 654 655 656 657 658 659 65a 65b 65c 65d 65e 65f 665 765 865 965 a65 b65 c65 d65 e65 f65