spoilers

the reason why the duchess likes purple eyes is that the 1st duchess told her to treat ppl with purple eyes with respect. Because her dad had a thing for purple eyes, and wouldn't let the 1st duchess go. So she escaped her dad with marriage. Also, Lucas's dad's father isn't the duke, it's someone else.


Plus Judith is related to the royal family.

and the dark-haired guy and Judith do get together, but they have to date secretly, since the former king won't allow Judith to date anyone, since she has purple eyes

https://i.imgur.com/Hka3qcy.png