There is a film purchaseable at Lowes which you can apply to the inside of your windows to block UV rays. It's reasonably easy to install, especially with 2 people, and does not seem to affect the light you want at the window or the view. I used to use it in my studio; haven't thought of it in years, now wish I had some more! Reds and navies seem to be particularly vulnerable to fading, btw.
Jan in VA