First thing I'd do is throw the grey carpet up onto the sofa. Meaning it's colour. Introduce a thick grey throw, loosely folded over one of the seats, up over the back then layer your cushions in front of that. Building up onto it will scatter your colour palette around and start bringing it all together. It will be softened. However keep your colours to a minimum, perhaps 2. This does not include tones of colour, as many as you like will add interest and sophistication. In a chocolate and grey interior, it could be luxe, but I am thinking shades of salmon and mustard up against creams and greys. You also need to link your walls to the sofas, as the floor area looks heavy in comparison. To correct it you either introduce the wall colour down onto the floor, or the floor colour up onto the wall, it will balance it out. I'd place large black frames with rich colours of chocolate with perhaps gold leaf or metallics. Keep it abstract to be modern, or even go the opposite with some classic charcoal pencil sketches in a pair of large frames. The images will start to personify your space, so choose the context of the image that you can continue a theme from, like architecture where you can place related objects on a side table, even coffee table, I love tables with reference books that on a Whim you can pick up for inspiration. It shows who you are and what you aspire to. Or it may be floral, landscapes, paintings whatever, find something that works. Don't necessarily go looking for art, you can make it, save an image online, print and frame to suit you and your budget. Even an a3 image can be framed in a larger frame to make a bold statement, just add a frame Matt that you get from a picture frame shop. Ikea also have ready made large frames too. For some reason emerald green keeps popping into my mind when I look at your room, maybe some plants, foliage can liven a space but also, slight little traces of it around can freshen a space. Maybe thin picture frames, or spines of books can bring this in.

Do you have a picture of the room? If you get a tan leather to go back with the grey, I would want to see cushions, throws, a rug and artwork that have lots of grey and tan to link the colour palette together. If you go for fabric, then your choices for decorating the space can potentially be broadened to your imagination... depending on what else is already in the space (that's why a photo will help).

I would choose a grey sofa, but really any colour would look great, tan leather, white , depends what style you are looking for, could be ultra glamorous or a casual boho luxe , love those colours throughout, could look gorgeous

Hi Carla,love oklouise ‘s ideas, My most favourite chair is the iconic butterfly, throw a fur over it and it looks beautiful, I think a tan leather will go with your couches, add a rug, some stylish cushions , plants and it could look gorgeous