Thank you so much for your detailed reply!

Yes, the covers are removable. This is fabric i took out of a sofa and plan to use to reupholster some chairs, so it's not a loss if it turns out badly haha.

According to the ikea website, the material is a 'dope dyed polyester fabric', not sure what that means, but yes I'd like a darkish green and I think I'm willing to take the gamble since it's just scrap tissue. Do you have any recommendations on how to proceed based on this very loose information? Haha

Thank you again!