Closest hex to #506743 is #564

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#564

506743

506743

contains 56

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contains 64

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contains 54

054 154 254 354 454 540 541 542 543 544 545 546 547 548 549 54a 54b 54c 54d 54e 54f 554 654 754 854 954 a54 b54 c54 d54 e54 f54