Closest hex to #b66e03 is #b60

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#b60

b66e03

b66e03

contains b6

0b6 1b6 2b6 3b6 4b6 5b6 6b6 7b6 8b6 9b6 ab6 b60 b61 b62 b63 b64 b65 b66 b67 b68 b69 b6a b6b b6c b6d b6e b6f bb6 cb6 db6 eb6 fb6

contains 60

060 160 260 360 460 560 600 601 602 603 604 605 606 607 608 609 60a 60b 60c 60d 60e 60f 660 760 860 960 a60 b60 c60 d60 e60 f60

contains b0

0b0 1b0 2b0 3b0 4b0 5b0 6b0 7b0 8b0 9b0 ab0 b00 b01 b02 b03 b04 b05 b06 b07 b08 b09 b0a b0b b0c b0d b0e b0f bb0 cb0 db0 eb0 fb0