Closest hex to #05fbbb is #0fb

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#
#0fb

05fbbb

05fbbb

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 fb

0fb 1fb 2fb 3fb 4fb 5fb 6fb 7fb 8fb 9fb afb bfb cfb dfb efb fb0 fb1 fb2 fb3 fb4 fb5 fb6 fb7 fb8 fb9 fba fbb fbc fbd fbe fbf ffb

contains 0b

00b 0b0 0b1 0b2 0b3 0b4 0b5 0b6 0b7 0b8 0b9 0ba 0bb 0bc 0bd 0be 0bf 10b 20b 30b 40b 50b 60b 70b 80b 90b a0b b0b c0b d0b e0b f0b