Closest hex to #77ff77 is #7f7

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#7f7

77ff77

77ff77

contains 7f

07f 17f 27f 37f 47f 57f 67f 77f 7f0 7f1 7f2 7f3 7f4 7f5 7f6 7f7 7f8 7f9 7fa 7fb 7fc 7fd 7fe 7ff 87f 97f a7f b7f c7f d7f e7f f7f

contains f7

0f7 1f7 2f7 3f7 4f7 5f7 6f7 7f7 8f7 9f7 af7 bf7 cf7 df7 ef7 f70 f71 f72 f73 f74 f75 f76 f77 f78 f79 f7a f7b f7c f7d f7e f7f ff7

contains 77

077 177 277 377 477 577 677 770 771 772 773 774 775 776 777 778 779 77a 77b 77c 77d 77e 77f 877 977 a77 b77 c77 d77 e77 f77