Color determines the emotional tone of the living room, and reasonable oil painting color matching can adjust the indoor atmosphere. Design statistics show that the main color of the decorative oil painting maintains a 30% to 50% consistency with the indoor soft furnishing color system, which can realize unified tone and rich layers without clutter. For living rooms with sufficient natural light, oil paintings with medium and high saturation colors can be selected to enhance space vitality. For dark living rooms with insufficient light, light-toned works in beige, light gray and warm yellow are the best choices, which can improve the indoor brightness by about 20%. In addition, warm-colored oil paintings are suitable for winter atmosphere, while cool-toned landscape paintings can relieve stuffiness in summer.