1: The red rule in interior design is to use the color sparingly for a bold pop.

2: Red can add warmth and energy to a room, but too much can be overwhelming.

3: Incorporate red accents through pillows, rugs, or artwork for a balanced look.

4: Pair red with neutral colors like white, gray, or beige for a sophisticated vibe.

5: Consider the tone of red - from vibrant cherry red to deep burgundy - to set the mood.

6: Red can create a focal point in a space, drawing the eye and adding visual interest.

7: Experiment with different shades of red to find the perfect balance for your design.

8: Use red in unexpected ways, like on a ceiling or door, for a unique and dramatic touch.

9: Remember, the red rule is about balance - don't be afraid to mix and match with other colors.