Blood and Ice Cream Trilogy

The Blood and Ice Cream Trilogy (also known as The Three Flavours Cornetto Trilogy) is a trio of films directed by Edgar Wright and Simon Pegg. It stars Simon and Nick Frost. Currently, three films have been released, Shaun of the Dead in 2004, and Hot Fuzz in 2007. The third and final film, The World's End was released 2013.

The Flavours

Shaun of the Dead  Red = The color of blood 

Hot Fuzz  Blue =  Homage to police colors

The World's End  Green  = A general color of aliens is green