If blue light has more energy than red light how can they travel the same speed?

Question

First off, E=mc^2 so howcome photons don't have any mass, they just have energy?

Answer 1

c - speed of light and is constant
c=(wavelength) x (frequency)

also

E=(h) x (frequency)
E- energy
h- Plank's constant

the wavelength changes with change of frequency, however the energy is frequency dependent.