Thinking about giving the outside of your house a fresh paint job? The color of paint you choose can have a big impact on how energy-efficient your home can be. Lighter-colored homes in warmer climates have a higher light reflective value (LRV). Pure black measures zero percent LRV, and pure white measures 100 percent LRV. By choosing a lighter tint, you reflect light away, and your home uses less energy to stay cool. For homes that are in more predominantly colder climates, a darker color can help absorb heat and reduce heating costs.