Closest hex to #81CE23 is #8c2

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#
#8c2

81CE23

81CE23

contains 8c

08c 18c 28c 38c 48c 58c 68c 78c 88c 8c0 8c1 8c2 8c3 8c4 8c5 8c6 8c7 8c8 8c9 8ca 8cb 8cc 8cd 8ce 8cf 98c a8c b8c c8c d8c e8c f8c

contains c2

0c2 1c2 2c2 3c2 4c2 5c2 6c2 7c2 8c2 9c2 ac2 bc2 c20 c21 c22 c23 c24 c25 c26 c27 c28 c29 c2a c2b c2c c2d c2e c2f cc2 dc2 ec2 fc2

contains 82

082 182 282 382 482 582 682 782 820 821 822 823 824 825 826 827 828 829 82a 82b 82c 82d 82e 82f 882 982 a82 b82 c82 d82 e82 f82