Put simply, the 60-30-10 rule is a technique used by designers in multiple industries to ensure the perfect color balance, be it for a print ad, an outfit, or, in this case, a home. The rule breaks down how to use color into an easy-to-understand concept that anyone can apply to build a harmonious interior. Let's work backward. If a complete, balanced interior represents 100% , this technique takes that 100% apart to form a sort of "color hierarchy." It is broken down into three essential parts: 1. 60% is the main color. 2. 30% is the secondary color. 3. 10% is the accent color.