Closest hex to #30bffc is #3bf

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#3bf

30bffc

30bffc

contains 3b

03b 13b 23b 33b 3b0 3b1 3b2 3b3 3b4 3b5 3b6 3b7 3b8 3b9 3ba 3bb 3bc 3bd 3be 3bf 43b 53b 63b 73b 83b 93b a3b b3b c3b d3b e3b f3b

contains bf

0bf 1bf 2bf 3bf 4bf 5bf 6bf 7bf 8bf 9bf abf bbf bf0 bf1 bf2 bf3 bf4 bf5 bf6 bf7 bf8 bf9 bfa bfb bfc bfd bfe bff cbf dbf ebf fbf

contains 3f

03f 13f 23f 33f 3f0 3f1 3f2 3f3 3f4 3f5 3f6 3f7 3f8 3f9 3fa 3fb 3fc 3fd 3fe 3ff 43f 53f 63f 73f 83f 93f a3f b3f c3f d3f e3f f3f