Choose a palette of no more than two colors in various hues to use throughout the rooms. Apply the lighter hue of paint in sunnier rooms to intensify the muted and airy feeling that lighter colors tend to embody.
Paint all trim work in adjoining rooms the same color to unify the rooms. Use white or cream as a safe bet to unify the spaces and anchor one room to another.
Paint walls in complementary colors in open spaces if a simple palette is not appealing; it’s the easiest way to give each room its own identity. Use the color wheel as your guide when choosing this approach and pair colors.
Include the ceiling in the painting process to fully encompass a unified look among the rooms.