Ahh, blue denim on silver alcantara, as I had on the Supersport option seats fitted to my last Audi (S4). It soon became obvious and I then had to scrub both drivers and passenger seats to get the colour off and to make them both look the same. Rears looked very different from the fronts after that, but at least it wasn't quite so obvious.
And all my cars have had a full eating ban since time began..... Can't stand a messy interior...