Jian Xiao Jing'an

The down-and-out eldest son of a marquis family bears a blood feud and uncovers the secret of his family's injustice amidst the disputes in the world. In the end, he joins hands with the forces of good and evil to crush the conspiracy to overthrow the dynasty and reshape the order of the world. Okay, this is all nonsense from me. To put it simply, the protagonist is a person who is so dark that he turns purple or turns purple. Easy and funny.