Yellow flames are a common sight in fires, often indicating the presence of certain materials being burned. The yellow color is primarily due to the incandescence of tiny soot particles that are heated to high temperatures. When these particles glow, they emit light in the yellow spectrum, creating the characteristic color of the flames. The temperature of yellow flames is typically lower than that of blue flames, which indicate more complete combustion. In many cases, yellow flames can be seen when burning organic materials, such as wood or paper, and are often associated with campfires and candles.