You can take the lenses out. Just make sure you start on the top just above the nose and work your way down to the nose. Also avoid rubbing or pressing too hard on the inside of the lense, you can remove or wear away the anti fog coating and no aftermarket product is as good.
The foam will be died too if it is light colored, but it shouldn't ruin the quality of the foam.
You can die just about anything that is plastic, just buy white! Baby blue will not turn orange. It will turn puce.
I remember some guy once asked if he could die black frames to a lighter color. So sad.