Closest hex to #b78b11 is #b81

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#b81

b78b11

b78b11

contains b8

0b8 1b8 2b8 3b8 4b8 5b8 6b8 7b8 8b8 9b8 ab8 b80 b81 b82 b83 b84 b85 b86 b87 b88 b89 b8a b8b b8c b8d b8e b8f bb8 cb8 db8 eb8 fb8

contains 81

081 181 281 381 481 581 681 781 810 811 812 813 814 815 816 817 818 819 81a 81b 81c 81d 81e 81f 881 981 a81 b81 c81 d81 e81 f81

contains b1

0b1 1b1 2b1 3b1 4b1 5b1 6b1 7b1 8b1 9b1 ab1 b10 b11 b12 b13 b14 b15 b16 b17 b18 b19 b1a b1b b1c b1d b1e b1f bb1 cb1 db1 eb1 fb1