What word is for red and blue example?

There isn't one specific word that perfectly encapsulates the concept of "red and blue example." However, depending on the context, you could use several options:

General:

* Complementary colors: This describes red and blue as being opposite on the color wheel.

* Contrasting colors: This emphasizes the stark difference between the two colors.

* Primary colors: Red and blue are often considered primary colors in various color systems.

Specific:

* Red, white, and blue: This refers to the colors of the American flag, often used to symbolize patriotism.

* Blue and red pill: This alludes to the "Matrix" movie, where the choice between red and blue pills symbolizes different paths in life.

More context is needed:

To give you the most accurate word, please provide more information about the context of the "red and blue example." What are you using it for? What are you trying to communicate?