I think
Jexnell had an Oscar like yours with few markings that colored up real nice as it grew. One of the better looking ones I’ve seen. Maybe he’ll post a pic.
As others have mentioned Oscar's change drastically as they grow.
My girl Toni is a fine example of that. When I got her she had about six dots or so on each side. Her eyes were red so I believed she was an albino.
And then she started growing...
As she grew more orange showed up and her eyes went black
Shortly after this picture I belive is when I started feeding her freeze dried krill. That's when she got an orange explosion.
And this was her at roughly 12inches
I have seen it many times here with others Oscar's. As they grow thier looks change. Wait it out and see what you get.
You can help the orange by feeding freeze dried krill.