Closest hex to #21c871 is #2c7

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#2c7

21c871

21c871

contains 2c

02c 12c 22c 2c0 2c1 2c2 2c3 2c4 2c5 2c6 2c7 2c8 2c9 2ca 2cb 2cc 2cd 2ce 2cf 32c 42c 52c 62c 72c 82c 92c a2c b2c c2c d2c e2c f2c

contains c7

0c7 1c7 2c7 3c7 4c7 5c7 6c7 7c7 8c7 9c7 ac7 bc7 c70 c71 c72 c73 c74 c75 c76 c77 c78 c79 c7a c7b c7c c7d c7e c7f cc7 dc7 ec7 fc7

contains 27

027 127 227 270 271 272 273 274 275 276 277 278 279 27a 27b 27c 27d 27e 27f 327 427 527 627 727 827 927 a27 b27 c27 d27 e27 f27