Closest hex to #cf0900 is #c10

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#
#c10

cf0900

cf0900

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

contains 10

010 100 101 102 103 104 105 106 107 108 109 10a 10b 10c 10d 10e 10f 110 210 310 410 510 610 710 810 910 a10 b10 c10 d10 e10 f10

contains c0

0c0 1c0 2c0 3c0 4c0 5c0 6c0 7c0 8c0 9c0 ac0 bc0 c00 c01 c02 c03 c04 c05 c06 c07 c08 c09 c0a c0b c0c c0d c0e c0f cc0 dc0 ec0 fc0