Closest hex to #66bcb3 is #6bb

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#6bb

66bcb3

66bcb3

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 bb

0bb 1bb 2bb 3bb 4bb 5bb 6bb 7bb 8bb 9bb abb bb0 bb1 bb2 bb3 bb4 bb5 bb6 bb7 bb8 bb9 bba bbb bbc bbd bbe bbf cbb dbb ebb fbb

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