Closest hex to #7f51b5 is #75b

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#75b

7f51b5

7f51b5

contains 75

075 175 275 375 475 575 675 750 751 752 753 754 755 756 757 758 759 75a 75b 75c 75d 75e 75f 775 875 975 a75 b75 c75 d75 e75 f75

contains 5b

05b 15b 25b 35b 45b 55b 5b0 5b1 5b2 5b3 5b4 5b5 5b6 5b7 5b8 5b9 5ba 5bb 5bc 5bd 5be 5bf 65b 75b 85b 95b a5b b5b c5b d5b e5b f5b

contains 7b

07b 17b 27b 37b 47b 57b 67b 77b 7b0 7b1 7b2 7b3 7b4 7b5 7b6 7b7 7b8 7b9 7ba 7bb 7bc 7bd 7be 7bf 87b 97b a7b b7b c7b d7b e7b f7b