A man shoots another with a silenced pistol. Lots of blood splatter on a pane of glass. Everything happens onscreen.
Three people are strangled with a garrote in a toilet cubicle. The second fights back. Another person shoots at the gangster, missing his head but shooting his ear off. blood splatters.
The film doesn't contain too many moments of violence, but those that are there are bloody.
In the beginning, Tom Ripley kills a person with a poker. Little blood.
As the film progresses, several people are shot or otherwise killed. Only the gunshot kills are gory.