The colors of the rainbow, in their most common form, follow the order of red, orange, yellow, green, blue, indigo, and violet. This sequence is often remembered with the mnemonic "ROYGBIV." These colors appear when light is broken down into different visible wavelengths as it passes through water droplets in the atmosphere, a process known as refraction. Each color represents a specific wavelength, and the combination of all these colors produces white light. The beauty of a rainbow is a result of this dispersion of light, creating a spectrum of colors that can be seen under the right conditions.