Closest hex to #d13d13 is #c41

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#c41

d13d13

d13d13

contains c4

0c4 1c4 2c4 3c4 4c4 5c4 6c4 7c4 8c4 9c4 ac4 bc4 c40 c41 c42 c43 c44 c45 c46 c47 c48 c49 c4a c4b c4c c4d c4e c4f cc4 dc4 ec4 fc4

contains 41

041 141 241 341 410 411 412 413 414 415 416 417 418 419 41a 41b 41c 41d 41e 41f 441 541 641 741 841 941 a41 b41 c41 d41 e41 f41

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