Brighten a dark or windowless hallway by applying a soft pastel yellow paint shade paired with bright white architectural woodwork. Select a pale butter yellow or soft chiffon shade with warm, sunny undertones for the main stairwell walls. Apply a crisp, semi-gloss white paint to the handrails, banisters, baseboards, and stair risers to frame the yellow walls cleanly. The yellow hue acts as an artificial light booster, reflecting available overhead fixture light and making enclosed stairwells feel sunny and spacious. This cheerful color strategy works particularly well in traditional homes, cottage-style interiors, or narrow entry hallways lacking natural exterior windows.