Common mistakes with dopamine decor include mistaking bold color for chaotic design and overusing saturated hues without balancing them. Ignoring personal joy triggers or cluttering spaces with too many objects can also overwhelm the senses rather than uplift mood. To avoid these, use the 60-30-10 color ratio to maintain harmony: sixty percent saturated comfort color, thirty percent secondary hues, and ten percent accent shades. Combine joyful colors with balanced textures and curated personal artifacts to create a visibly pleasing but calming environment.