Thread:Krayfish/@comment-5362365-20130115065210/@comment-1743498-20130115225557

M class is red, K class ir orange to yellow, G class is yellow, and F class is yellow-white.

It's really the atmosphere that determines how the star actually looks like from the surface of a planet. There would have to be some gas that blocks the other wavelengths of light, only showing the blue-purple range. F class emits significantly higher ultraviolet wavelengths than the other stars, so there could be a higher concentration of gases that absorb infrared light. The sky would appear purplish, and the sun, a blue tint. As to what these gases might be, I am unsure of.