* [[http://www.brioblu.it/#/home This]] Italian brand of drinking water comes in two colors: red for "very fizzy" and blue for "lightly fizzy". [[http://www.youtube.com/watch?v=J25Vpj_VJNk The testimonials]] also reflect it in their personality.
* "I'm a Mac." "And I'm a PC".
* Sanrio's ''Patty & Jimmy'' are well played in this trope: Patty is the red oni, because she excels in sports, but fails in studies. Jimmy is the blue oni, because he is not very athletic, but has A+ grades in such classes as math, and reading. In addition, the two friends wear their respective colors... most of the time.
* UK Milky Way advertisement: [[http://www.youtube.com/watch?v=Y4drNFXd6dw The red car and the blue car had a race...]]