Closest hex to #ff55aa is #f5a

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#f5a

ff55aa

ff55aa

contains f5

0f5 1f5 2f5 3f5 4f5 5f5 6f5 7f5 8f5 9f5 af5 bf5 cf5 df5 ef5 f50 f51 f52 f53 f54 f55 f56 f57 f58 f59 f5a f5b f5c f5d f5e f5f ff5

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

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