Seal oil?

[resbou]

Good evening!

I'm very new to this and started on my first project yesterday. I'm making a notebook cover and I used naked veg tanned shoulder. After cutting it out, I got excited and wanted to add some color to it. I realized that didn't purchase any dye with my leather, so I lathered it in Obenauf's Leather Oil; which I use to protect my leather boots. I love the way it turned out!

My question is this: Will the color hold if I do nothing? Do I need to seal it somehow? Can you even seal Oil? How can I keep it like it is without sacrificing the integrity of the leather?

Thanks so much!!