Layering decor with groups of three brings calmness by creating visual harmony and reducing clutter. Three carefully selected and arranged objects offer variety without chaos, providing structure and rhythm that relax the eye. For example, placing three textured vases or combining three shades of paint tones creates depth and softness. This approach aligns with 2025 design trends that value intentionality, allowing rooms to feel lived-in, balanced, and peaceful rather than busy or overwhelming, which enhances wellbeing.