Help for sun-faded garden flag?

[Mrs. Bradbury]

Maybe I'm not using the right search keywords but I'm having no luck googling this or searching this thread. I have many decorative flags that are perfectly good except the colors have faded. Is there a way to refresh the colors? They're the good quality, stitched together kind and I love them, but they're too faded to keep using as they are.

Any suggestions?

Thanks,