Closest hex to #55ffaa is #5fa

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#5fa

55ffaa

55ffaa

contains 5f

05f 15f 25f 35f 45f 55f 5f0 5f1 5f2 5f3 5f4 5f5 5f6 5f7 5f8 5f9 5fa 5fb 5fc 5fd 5fe 5ff 65f 75f 85f 95f a5f b5f c5f d5f e5f f5f

contains fa

0fa 1fa 2fa 3fa 4fa 5fa 6fa 7fa 8fa 9fa afa bfa cfa dfa efa fa0 fa1 fa2 fa3 fa4 fa5 fa6 fa7 fa8 fa9 faa fab fac fad fae faf ffa

contains 5a

05a 15a 25a 35a 45a 55a 5a0 5a1 5a2 5a3 5a4 5a5 5a6 5a7 5a8 5a9 5aa 5ab 5ac 5ad 5ae 5af 65a 75a 85a 95a a5a b5a c5a d5a e5a f5a