Which colour has largest wavelength in the spectrum of white light?

1. Violet
2. Green
3. Red
4. Blue

In the visible spectrum of light, different colors correspond to different wavelengths. Red light has the longest wavelength, ranging from approximately 620 to 750 nanometers. Violet light has the shortest wavelength. The order of increasing wavelength is violet, indigo, blue, green, yellow, orange, red.