Help

I have read this one historical theme mahwa long back, don't know the name. But I know the plot.

The fl (blonde hair green eyes) gets married to duke (black hair red eyes). They spend a night and after his father dies, he divorce her. She goes to somewhere and gives birth to a boy just like his dad. To hide him, she pours a herb to change his eye colour red to blue. In later chapter there's a lot of drama going on. It's completed