We also have the Klippan loveseat 2 seater. We originally purchased one and dyed it pink for my daughter's birthday. This is truer to the color than the picture above of our pink cover. This was using 2 bottles of Fuchsia on the 2 seat loveseat cover.
We also wanted to dye a cover dark gray but didn't/couldn't find any black in liquid form at the time and used the powdered gray. It totally didn't work out well. You can see in the picture from this post HERE from last time we talked about dying that it looked too blue.
Well, we bleached that one with a gallon of bleach and lots of rinse water in the bath tub.
Then we put two bottles of golden yellow and 1/2 a bottle of sunshine orange into the water.
We then put our freshly washed cover into the water and let it soak. We constantly came back and moved the fabric around to ensure it was all covered with dye.
So now we have a dark gray couch and a yellow loveseat and we just LOVE them both!