Closest hex to #530a51 is #515

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#515

530a51

530a51

contains 51

051 151 251 351 451 510 511 512 513 514 515 516 517 518 519 51a 51b 51c 51d 51e 51f 551 651 751 851 951 a51 b51 c51 d51 e51 f51

contains 15

015 115 150 151 152 153 154 155 156 157 158 159 15a 15b 15c 15d 15e 15f 215 315 415 515 615 715 815 915 a15 b15 c15 d15 e15 f15

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