My husbands eyes are blue in winter and green in summer, why is that?

Green eyes tend to change. Mine go between blue, green and grey

In the winter he's lying on ice and in the summer he's lying on grass?

Reflections, don't ya know?

You are mistaking them for one color due to the light

Mine do the same but never understood why

he's an alien lizard man...

He's full of crap in the summer?