I first tried the Tulip Color Shot Instant Fabric Color. I wasn't impressed, I used two cans on the seat cushion and it barely covered the pink and left the fabric feeling very rough.
Continuing at this rate it would be an expensive and not to comfy update to this chair. This lead me back to the product by Golden GAC-900 which is a fabric painting medium. . I've used this on some other decorative artistic projects and thought why not give it a try on this chair.
So here's the finished project with two coats of paint and the seat cushion recovered.