To create a cohesive Halloween color palette for decorating, start by choosing two to three core colors that set the mood. Classic combos include black with orange and warm neutrals like beige or brown, which add depth and style. Using a limited palette helps unify your decor across rooms or outdoor spaces without feeling cluttered. Incorporate these colors consistently in paper crafts, candle jars, wreaths, and fabric props like ghost sheets. For example, black paper bats on white walls paired with orange-lit lanterns create strong contrast and atmospheric lighting. Repeat your chosen colors in small accents like ribbons or lantern clusters to elevate the overall style. This restrained, intentional palette makes all your DIY elements look designer and keeps the focus on mood and texture.