What are the colors of the rainbow?
user
The visible spectrum of colors is comprised of seven principal colors -- red, orange, yellow, green, blue, indigo, and violet -- and these colors occur in the order from shortest wavelengths to longest wavelengths (or from smallest to largest wavelength).  When the colors in the visible spectrum of light are produced in a luminous beam or dispersion of light, they appear in the order of red, orange, yellow, green, blue, indigo, and violet, in an arch span of full spectrum color from the letters red to violet.  Therefore, the rainbow consists of red, orange, yellow, green, blue, indigo, and violet.
assistant
What are the colors of the rainbow?
user
It depends! There are actually different versions of the spectrum, but typically there is one hue for red from the visual spectrum, one for orange, one for yellow, one for green, one for blue, one for indigo, and one for violet.  Neat, right?
assistant
What are the colors of the rainbow?