What is the 70/30 rule in interior design?

The 70/30 rule in interior design is a principle that suggests achieving a balanced and visually appealing space by using 70% of one dominant color, pattern, or design element and the remaining 30% of complementary or contrasting elements. This rule helps create harmony in a room while allowing for visual interest through contrast and variation.

Here’s how the 70/30 rule works:

1. The 70% (Dominant Element)

This is the main color, pattern, or design element in the room. It sets the tone and serves as the foundation for the overall aesthetic. Typically, the dominant element is applied to the larger surfaces or more permanent features, such as:

• Walls: A single neutral color like white, beige, or soft gray often covers 70% of the room’s space.
• Furniture: A large piece of furniture (like a sofa or bed) may be the primary color or material in the room, usually a neutral tone.
• Flooring: Wooden floors, neutral carpets, or light-colored tiles may make up the 70% of the base look.
• Large textiles: If you use a lot of fabrics (curtains, upholstery), this 70% might also be the color of these pieces.

2. The 30% (Complementary or Contrasting Elements)

This portion is used for the accents, contrasts, and secondary design elements that add variety, texture, and interest to the space. The 30% is often used to introduce color, pattern, or texture that contrasts with the dominant element, providing a pop or focal point. This might include:

• Accent colors: Add bold hues to throw pillows, rugs, or wall art. For example, if the room has a neutral color scheme, the 30% might be bright colors like yellow, teal, or mustard.
• Smaller furniture pieces: Chairs, side tables, or ottomans in a contrasting color or material.
• Textiles: Bright-colored cushions, throws, or patterned curtains that contrast with the main color.
• Decorative accessories: Items like vases, lamps, or books that introduce different textures, patterns, or accent colors.

Why It Works:

• Visual Balance: The 70/30 rule provides a sense of balance and cohesion in a room, ensuring that the space doesn’t feel too heavy on one side or overwhelming with competing colors and patterns.
• Simplicity with Interest: The 70% gives the room a sense of calm and neutrality, while the 30% adds contrast, fun, or focal points without creating chaos.
• Flexibility: It allows flexibility in how you incorporate accent pieces. Whether you want to go bold with the 30% or keep it subtle, the rule ensures the overall design remains balanced.

Example:

• Living Room: If your walls are painted a neutral gray (70%), you might use a rich teal or mustard yellow for the cushions, a patterned rug, and a colorful throw blanket (30%).
• Bedroom: In a bedroom with a soft white or light gray duvet and walls (70%), the 30% might come from the bed’s throw pillows, a colorful artwork above the bed, or a vibrant accent wall.

When to Use the 70/30 Rule:

• When you want to create a harmonious space that feels balanced and well-coordinated.
• When you want to incorporate a bold accent without overpowering the room’s design.
• When designing a space that needs visual cohesion, like open-plan living areas or neutral spaces that require a bit of personality.

In summary, the 70/30 rule is a simple and effective approach to designing a balanced, attractive space by using 70% of a dominant design element and 30% for accents and contrasts. It helps ensure that the room feels both cohesive and visually dynamic.