Closest hex to #554455 is #545

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#
#545

554455

554455

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

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

contains 55

055 155 255 355 455 550 551 552 553 554 555 556 557 558 559 55a 55b 55c 55d 55e 55f 655 755 855 955 a55 b55 c55 d55 e55 f55