Hi Carolina I have these floor tiles and a similar wall colour, and lots of art. My stair carpet is wool and called taupe. I think it works well. I think any of the 3 samples would look equally good. Darker will show every speck of lint though. I will now try and put a photo on. Forgive me if it doesn't work, for being a technophobe, and forgive me if it does for a messy house. I am going to clean today. Honest.

I can only speak from experience of tiles and Karndean. We have two dogs, live in the country, we and the dogs are in and out all day. The dogs both used to slip even on terracotta ( back in the old days), and, i'd be worried about shiny tiles, especially with larger dogs that could slip far more easily and cause themselves damage. The tiles were dark and had to go, as they showed up the dirt. The grout was the biggest problem, as it was easily stained, and just not practical with dogs. We swapped to Karndean around 5/6 years ago and haven't looked back since. It's simply the best, unscratchable, hard wearing, versatile, easily cleaned surface ever. We live in an old cottage and it had to fit in, so we went with Van Gogh, a floorboard effect look, complete with etched woodworm holes! Love it.

Composite Deck? Once down you'll have very little maintenance for years. You could find a colour that matches your Ikea tiles too. Let me know if you need any assistance.

Humm, I had a similar colour carpet in an old rented flat years ago. It was a hard one to modernise up really but it was just a bedroom and I ended up using raspberry pink and creams which really lifted it. Also a rug over the carpet in the sofa area could draw your eyes to that and the carpet can just act as a background colour. It depends on your tastes really ie as mentioned, a country floral style would work well with the room itself. But, if you have more contemporary taste or prefer brighter colours then you could even go for a vibrant palate on a more tropical floral theme. Introduce neutral charcoal sofa with tropical cushions in deep greens with the same raspberry pinks etc and use lots of leafy plants in the room and artwork.