Closest hex to #1d0c1f is #212

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#212

1d0c1f

1d0c1f

contains 21

021 121 210 211 212 213 214 215 216 217 218 219 21a 21b 21c 21d 21e 21f 221 321 421 521 621 721 821 921 a21 b21 c21 d21 e21 f21

contains 12

012 112 120 121 122 123 124 125 126 127 128 129 12a 12b 12c 12d 12e 12f 212 312 412 512 612 712 812 912 a12 b12 c12 d12 e12 f12

contains 22

022 122 220 221 222 223 224 225 226 227 228 229 22a 22b 22c 22d 22e 22f 322 422 522 622 722 822 922 a22 b22 c22 d22 e22 f22