What is the unexpected red theory? Interior designers explain the trend – sharing 5 creative ways to use it in your home

Collage of five different rooms to show the power of the unexpected theory of red in interior design.

If you're looking to revamp your interiors this spring and are in the mood for something fun, playful, and different, you need to know about the unexpected red theory.

This design rule is taking social media by storm, with homeowners and interior specialists alike swearing by the unexpected red theory as a design secret worth knowing. Trending rule aesthetics often come and go, but this one seems to have cemented itself as a permanent fixture in the world of interior design.