isekai manhwa

okay so there was this manhwa with coleos that i read a while ago , it's an isekai where the girl dies(?) in her priginal world and gets transported into the body of a noble woman who's engaaged to the crown prince who's basically a bitch , she has a contact with a witch i think , and she's trying her best to leave to go back to her original world. At one point i think she was trying to get killed to go back . She has blue hair and the witch has red hair if i remember correctly.