Applying the rule of three to color schemes means choosing a palette with three key colors or tones to create balance and cohesion. A common approach is the 60-30-10 color rule: use 60 percent of a dominant neutral color, 30 percent of a secondary color for contrast, and 10 percent of an accent color for pops of interest. For example, a living room painted in warm neutrals, accented by a deep blue sofa and bright yellow pillows, achieves a dynamic yet harmonious look. Limiting your palette to three colors keeps spaces from feeling chaotic, while still vibrant and layered.