Closest hex to #557788 is #578

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#578

557788

557788

contains 57

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contains 78

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contains 58

058 158 258 358 458 558 580 581 582 583 584 585 586 587 588 589 58a 58b 58c 58d 58e 58f 658 758 858 958 a58 b58 c58 d58 e58 f58