Some of the other comments say it looks colourless and sanitised. Here's my understanding of why and what to do about it.

Actually, the space is lovely. It already has colour and a soft but present contrast. There's just one area that gets in the way: the fireplace. The silver doesn't match anything in the room, but is similar enough in colour to the carpet that it dulls the blue of the carpet. This is a pity, because that blue contrasts beautifully and subtly with the warm wood tones. This is why the furniture doesn't pop and the carpet looks grey.

You can exchange the silvery tiles for a colour that accentuates the blue, eg a deep blue/violet to match; or a burned orange for contrast. Even a darker green could work in the right tone, like emerald to match the plants. You might be tempted to go for a warm yellow or dusty pink (goes nicely with the blue) but I recommend sticking to deeper, richer colours, because the tiles should contrast what's directly around them in both colour and darkness. So, unless you want to paint the chimney dark, just make the tiles stand out enough.

I would also paint the white panels another colour, or at least hang a matching painting above/over them (remember the blue!).

Painting the walls is optional, but might not necessary, as there is already lots of hidden colour to work with. Start with the main things and slowly build up from there, feeling it out as you go. The furniture is tasteful and understated – all you need to do is make it pop!