Which color on the EM spectrum has the greatest speed?

Question

Which color on the EM spectrum has the greatest speed?

Answer 1

In the same medium, all EM waves travel at the same speed. What varies is the frequency and wavelength of the waves. Perhaps the question was worded incorrectly and should have been "Which color of the EM spectrum has the greatest FREQUENCY, or which color of the EM spectrum has the greatest WAVELENGTH?"

Answer 2

All colors, in fact, all EM waves travel at the same speed - the speed of light (300,000 km/s),