Closest hex to #1188ff is #18f

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#18f

1188ff

1188ff

contains 18

018 118 180 181 182 183 184 185 186 187 188 189 18a 18b 18c 18d 18e 18f 218 318 418 518 618 718 818 918 a18 b18 c18 d18 e18 f18

contains 8f

08f 18f 28f 38f 48f 58f 68f 78f 88f 8f0 8f1 8f2 8f3 8f4 8f5 8f6 8f7 8f8 8f9 8fa 8fb 8fc 8fd 8fe 8ff 98f a8f b8f c8f d8f e8f f8f

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