Rockford and Emmeline have EXACTLY the same eye colour.
The thing is this is not how genetic inheritance works. I know that eyes in particular are often used in movies, TV, books, and other fictional stories to show relationships, but it doesn't mean anything. In fact, it is extremely rare for sons to get the exact (in terms of shading) eye color of their biological father. It always depends on what DNA the mother contributes. But even if the father and mother have the same eye color, it is not inevitable that the offspring will have it. The blue eye color, for example, is dominant. This means that if both parents have green eyes, the child is still more likely to have the blue eyes of the maternal grandfather.
So the fact that Rockford has blue eyes, even though his supposed father has green eyes, is nothing out of the ordinary. But, from the looks of it, it doesn't matter anyway. Solomon is apparently not the father.