I've seen many people post about that, and how its normal. Does it happen eventually to all lutino oscars or just some? If it happens to all then I might as well buy a black oscar instead.
I hope my little lutino gal turns out that nicely. She has just a tiny touch of gray on her pectoral fins and slightly more orange than yours did at the beginning.
She has a nice red Oscar buddy in there with her but prefers the company of the male blood parrot who has been courting her.