Closest hex to #d18d18 is #c81

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#c81

d18d18

d18d18

contains c8

0c8 1c8 2c8 3c8 4c8 5c8 6c8 7c8 8c8 9c8 ac8 bc8 c80 c81 c82 c83 c84 c85 c86 c87 c88 c89 c8a c8b c8c c8d c8e c8f cc8 dc8 ec8 fc8

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 c1

0c1 1c1 2c1 3c1 4c1 5c1 6c1 7c1 8c1 9c1 ac1 bc1 c10 c11 c12 c13 c14 c15 c16 c17 c18 c19 c1a c1b c1c c1d c1e c1f cc1 dc1 ec1 fc1