Closest hex to #10b7ff is #1bf

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#1bf

10b7ff

10b7ff

contains 1b

01b 11b 1b0 1b1 1b2 1b3 1b4 1b5 1b6 1b7 1b8 1b9 1ba 1bb 1bc 1bd 1be 1bf 21b 31b 41b 51b 61b 71b 81b 91b a1b b1b c1b d1b e1b f1b

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 1f

01f 11f 1f0 1f1 1f2 1f3 1f4 1f5 1f6 1f7 1f8 1f9 1fa 1fb 1fc 1fd 1fe 1ff 21f 31f 41f 51f 61f 71f 81f 91f a1f b1f c1f d1f e1f f1f