A: I used on off white chairs and pure white pillows and didn't have an problems with color or staining
A: we used it on a fairly light colored, tufted couch. our material also has some texture. we tested on a small area in the back and once dried, we did not see any discoloration remaining. suggestion is to test it yourself, on a small area before treating the full chair
A: I used this on a light gray couch with no issues. No discoloration and seems to have continued protecting my couch. Try it first though on an area that doesn’t show.
A: You could but I would not recommend this item for outdoors