Closest hex to #d21730 is #c13

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#c13

d21730

d21730

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 13

013 113 130 131 132 133 134 135 136 137 138 139 13a 13b 13c 13d 13e 13f 213 313 413 513 613 713 813 913 a13 b13 c13 d13 e13 f13

contains c3

0c3 1c3 2c3 3c3 4c3 5c3 6c3 7c3 8c3 9c3 ac3 bc3 c30 c31 c32 c33 c34 c35 c36 c37 c38 c39 c3a c3b c3c c3d c3e c3f cc3 dc3 ec3 fc3