Closest hex to #665951 is #655

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#
#655

665951

665951

contains 65

065 165 265 365 465 565 650 651 652 653 654 655 656 657 658 659 65a 65b 65c 65d 65e 65f 665 765 865 965 a65 b65 c65 d65 e65 f65

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

contains 65

065 165 265 365 465 565 650 651 652 653 654 655 656 657 658 659 65a 65b 65c 65d 65e 65f 665 765 865 965 a65 b65 c65 d65 e65 f65