Closest hex to #40cb51 is #4c5

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#4c5

40cb51

40cb51

contains 4c

04c 14c 24c 34c 44c 4c0 4c1 4c2 4c3 4c4 4c5 4c6 4c7 4c8 4c9 4ca 4cb 4cc 4cd 4ce 4cf 54c 64c 74c 84c 94c a4c b4c c4c d4c e4c f4c

contains c5

0c5 1c5 2c5 3c5 4c5 5c5 6c5 7c5 8c5 9c5 ac5 bc5 c50 c51 c52 c53 c54 c55 c56 c57 c58 c59 c5a c5b c5c c5d c5e c5f cc5 dc5 ec5 fc5

contains 45

045 145 245 345 445 450 451 452 453 454 455 456 457 458 459 45a 45b 45c 45d 45e 45f 545 645 745 845 945 a45 b45 c45 d45 e45 f45