Closest hex to #550060 is #506

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#
#506

550060

550060

contains 50

050 150 250 350 450 500 501 502 503 504 505 506 507 508 509 50a 50b 50c 50d 50e 50f 550 650 750 850 950 a50 b50 c50 d50 e50 f50

contains 06

006 060 061 062 063 064 065 066 067 068 069 06a 06b 06c 06d 06e 06f 106 206 306 406 506 606 706 806 906 a06 b06 c06 d06 e06 f06

contains 56

056 156 256 356 456 556 560 561 562 563 564 565 566 567 568 569 56a 56b 56c 56d 56e 56f 656 756 856 956 a56 b56 c56 d56 e56 f56