The Rule of 3 in Interior Design

The Rule of Three suggests that items arranged or grouped in threes (or odd numbers) look more interesting and natural to the human eye than even-numbered groupings.

It applies to color, decor, furniture, lighting, and styling choices throughout a space.

 How It’s Used in Practice

1. Grouping Objects

• When styling surfaces (like coffee tables, shelves, or mantels), arrange three items of varying heights, shapes, or textures.

• Example: A vase, a candle, and a small stack of books.

  • This adds rhythm and prevents a flat, predictable look.

2. Color Palette

• Use three main colors in a room:

  1. Dominant color – for walls or large furniture (about 60%)

  2. Secondary color – for fabrics, rugs, or curtains (about 30%)

  3. Accent color – for accessories and artwork (about 10%)

This creates a cohesive and layered palette.

3. Furniture & Layout

• Try grouping furniture or decor elements in threes (e.g., three pendant lights over a kitchen island or three framed artworks on a wall).

• Odd-numbered arrangements draw the eye and make compositions feel more dynamic and less rigid.

4. Texture & Material

• Mix three different textures or materials in a space (e.g., wood, metal, and fabric) to add depth and tactile interest.

Here are some examples of what I mean :)