from Freedom ? I think I've got the same set and yes it fades if near the sun..mine was fading a bit had to move it in

My girl does dance and I dye her leather dance shoes sometimes. I get the dye at shoe repair stores. There must be a place to get bigger quantities. Try the Internet. There will be a special method to apply it.

here you go

https://www.google.com.au/search?q=How+to+dye+leather+sofas&ie=UTF-8&oe=UTF-8&hl=en&client=safari

probably better to buy a new set..white this time so it doesn't fade?

You need top quality UV film in the windows, and close drapes or blinds in the heat of the day.

Go to a professional for your uv film, and do your research first. There was a firm from Tassie on Houzz explained it all, there are lots of options.