Which color has the longest wavelength in the visible spectrum?

The color red has the longest wavelength in the visible spectrum, typically ranging from about 620 to 750 nanometers. In the context of visible light, wavelengths correspond to different colors, with red light having wavelengths longer than those of blue, green, and violet light.

When considering the order of colors in the visible spectrum, red appears at one end, while violet, which has a shorter wavelength, appears at the opposite end. This is a key characteristic of light, where longer wavelengths correspond to colors such as red and orange, while shorter wavelengths correlate with blue and violet. Thus, red is distinguished as the color with the longest wavelength among the options provided.