That's not the way hybrid plants are produced. A lime tree will always produce limes and a lemon tree will always produce lemons. If cross fertilisation has occurred, then the seeds within the fruits may, if sown and grown on to maturity, produce a hybrid plant with hybrid fruits. So whatever is going on with your fruits, it's nothing to do with the species crossing!

The Persian lime (Bearss lime) normally flowers in January or early February in the Northern Hemisphere; and the fruits are normally mature at this time, if left on the tree. This variety of lime turns a light yellow color when fully mature; IMHO the best time to consume it, as it is juicier and more flavorful than when green as it is normally marketed.

I was hoping for a limon.

I gave it a tug and it didn't seem like it was ready to let go yet. I've gotten fruit from the tree before but the color was darker about the same as the leaves. Maybe I picked it to soon.

Thanks for the info.