Paint finishes like matte, eggshell, satin, or glossy influence how light reflects off walls, altering color appearance. Matte finishes absorb light, softening colors and reducing sheen. Glossy finishes reflect more light, intensifying color brightness and highlighting imperfections. Testing your chosen paint in the finish you plan to use is vital to see true color results. Designers recommend sampling in actual finish to avoid surprises and ensure the color suits your room’s mood and texture preferences.