Closest hex to #6c6866 is #666

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#
#666

6c6866

6c6866

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

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

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