In my opinion, a cuckoo clock is a very detailed design, but you say you want a simple design for the room. When you say simple, are you thinking of no wallpaper, no wainscoting, and no accent color on the walls? It seems as if dark orange is a color you favor. I see it in art images and in your curtain color. If this was my space, I would paint all the walls one or two shades lighter than the beige of the sofa to keep the room as bright as possible because the room has no direct sunlight. I would paint the ceiling 1/4 (one part wall color to three parts white). I would use a satin or eggshell paint instead of matte, semi-gloss, or high-gloss paint. I see some discoloration on the wall behind the sofa where the brown color of the sofa frame has worn off onto the wall. I suggest attaching bumper dots or strips on the wood frame of the sofa (similar to the ones used to keep cabinet doors from making a lot noise when they are closed quickly). I would consider painting the sides of the column with the cuckoo clock brown to match the clock. I would do this to call attention to the clock. I would remove the orange curtains and replace them with floor-to-ceiling length draperies hung as close to the ceiling as possible to make the room seem larger and taller. I would change the drapery color to match the walls, perhaps in a muslin-like fabric, which is a casual fabric. I always take my art to a professional framer. I have conservation matting and museum glass used for my art. I would have the three images you have rearranged as a collage in a very large single frame with medium to wide matting between the images. I would have the mat and frame color(s) enhance the images, even if it is a color I might never have thought of on my own. I would hang it above the sofa. I would use the orange drapery fabric to make throw pillows for the sofas. You did not attach a photo of the flooring in the room. A medium tone floor is easier to keep looking clean than a light floor/rug or a very dark floor/rug. Other "Houzzers" will give you completely different ideas. Use the ideas YOU like and enjoy your home!

What soft furnishings do you have. You could pic out one or two colours as an accent colour and use that as your Base for the curtains. I currently have cream hessian walls and have a duck egg blue and chocolate curtains. I'm currently making matching Oxford cushion covers for the settees . If you can't find what your looking for ready made buy the fabric and have bespoke curtains made for you.

Hi there! You can use beige tones- they go really well with brown if you add a hint of blue accent on. Also grey walls go well too (depends on the type of sofa you have- would be great if you can share pictures of your furniture here)!

I have a few suggestions. Hope these will help. Go for a wooden sofa set. I know many people nowadays tend to go for fabric sofa sets and sectionals, but i fee that wooden sofas never go out of style. Also, you can change the upholstery colour any time if you want a more colourful look or a colourful slip cover (you can get a local uphostery guy to custom stitch one) which can be washed easily. Go for sleek furnitures that are not heavy. You can also add a few accent furniture pieces like an accent chair if the space allows for it. There are couple of things to note when you bring in colour. Choose one primary colour and maximum two secondary colours. See these links to [pep up your space[(https://www.houzz.in/magazine/is-your-living-room-too-brown-here-are-8-ways-to-pep-it-up-stsetivw-vs~101141558) and liven it. After you choose your colours, pick your decor. Add dashes of these colours through cushions, vases, flowers, paintings, figurines, curtains, carpets and other decor pieces. If you have a favourite painting, pick your accent colours from them. Or if you like the colours in a particular cushion covers, the other pieces can be colour matched. Always hang your paintings at eye level. I noticed that your hang your frames quite high up. Place them around 57 - 60 inches from the floor. Hope I could help