Interior Design What is the 3 color rule? March 3, 2026 by Mercier | Leave a Comment The 3-color rule, often referred to as the 60-30-10 rule, is a foundational principle in interior design and branding. It suggests using a dominant color for 60% of a space or design, a secondary color for 30%, and an accent color for the remaining 10% to create a balanced and visually appealing aesthetic. Understanding the […] Read more ยป