Read her lipstick
The film, as everyone knows, takes place in 1912, the year of the Titanic disaster. Given her privileged upbringing at the time, Rose probably wouldn’t have worn the famous red lipstick Kate Winslet wore in the film. She most likely wouldn’t have worn any makeup at all.
During the period, wearing makeup was considered uncool for upper-class English women and was mostly reserved for suffragettes and lower-class girls who had not had a “proper” upbringing. However, we must admit that Kate looks really gorgeous with her lipstick.