Closest hex to #0077ff is #07f

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#07f

0077ff

0077ff

contains 07

007 070 071 072 073 074 075 076 077 078 079 07a 07b 07c 07d 07e 07f 107 207 307 407 507 607 707 807 907 a07 b07 c07 d07 e07 f07

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 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