Oh no! It’s hard to say from the photo, but is there now a light patch on it? It may have been bleached by the napisan. If this is the case it’s a lost cause. No way to put colour back into the couch, the solution would be cover with rug or cushion.

For future spills, buy an upholstery cleaner spray from the supermarket and use it exactly as per instructions. They are formulated to not damage the fabric. Source: have successfully cleaned many spills and pet accidents. Internet advice for various concoctions is risky, because it might be completely different effects for example depending on the brand of dish soap, type of fabric on the couch etc. Also some of it is just junk advice, people repeating things they have never actually tried themselves, just to get internet clicks or ‘I have heard it works’.