Closest hex to #4400ff is #40f

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#
#40f

4400ff

4400ff

contains 40

040 140 240 340 400 401 402 403 404 405 406 407 408 409 40a 40b 40c 40d 40e 40f 440 540 640 740 840 940 a40 b40 c40 d40 e40 f40

contains 0f

00f 0f0 0f1 0f2 0f3 0f4 0f5 0f6 0f7 0f8 0f9 0fa 0fb 0fc 0fd 0fe 0ff 10f 20f 30f 40f 50f 60f 70f 80f 90f a0f b0f c0f d0f e0f f0f

contains 4f

04f 14f 24f 34f 44f 4f0 4f1 4f2 4f3 4f4 4f5 4f6 4f7 4f8 4f9 4fa 4fb 4fc 4fd 4fe 4ff 54f 64f 74f 84f 94f a4f b4f c4f d4f e4f f4f