Flame colors are the visible hues produced when substances are heated to high temperatures. Different elements emit specific colors when they are burned due to the excitation of their electrons. For example, when sodium is burned, it produces a bright yellow flame, while copper can create green or blue flames. The color of a flame can also indicate its temperature. Generally, cooler flames appear red or orange, while hotter flames can be blue or white. This phenomenon is useful in various fields, including chemistry and fire safety, as it helps identify substances and assess fire conditions.