Looks like you may already have a little bit of color blocking going on, but I'd increase the contrast between the shades of paint. Do you have access to the original paint chip card? Paint two of the walls in question in two different shades from that same card. Consult with the paint source for the complimentary color to accent the third wall. I think the middle wall to the right of the stairs would be the one I'd accent. Then add a large piece of colorful abstract art to that wall. Here's a quick tutorial on color blocking. https://www.houzz.com/magazine/building-with-blocks-of-color-stsetivw-vs~639

This space looks like a perfect spot for wallpaper or an accent color...wallpaper is making a big comeback and comes as simple as grass paper to more ornate or modern patterns...also a good option a subtle graphic paint treatment...the simple lines of the bannister invite a vertical stripe or pinstripe paint trtmt also

you are thinking about the space right now. it looks odd, no doubt. 1) when you fill in with the furniture, just make sure the three steps are hidden. 2) consider three potted plants of different height, so the rectangle is complete. 3) glass bowl with Siamese fighting fish for each step 4) figurines of different heights 5) 2inch square wooden bar on each step up to the top of the rectangle. and complete the entire rectangle if you want with a smaller rectangle open in the center my suggestion is, there is a reason why this space ended up like this. it will look great once you put something there. things like these are what make your house unique.

Hi Smita, A wall can add a lot of character to an existing space if treated wisely. - Even if its a small wall, a pop of colour can really liven it up. A collage of your favourite posters/ family photographs/ tribal masks/ wall sculptures can always add character and interest. These accents serve as good conversation starters as well. - A wallpaper is always an option when you want to add a bit of drama to the room. Couple it up with a large mirror and a couple of beautiful bracket lights to liven it up. - A wall mural adds an artistic touch to the wall. You could try getting it done by local artists or for a simpler option opt for decals. - A textured wall with a nice artwork or a painting can never go wrong if used wisely. Here are a few quirky ideas that we used in our projects to give these walls an uplift. Hope this helps. All the best! Regards, Team RnD Atelier