So you like purple? Please buy soft lavender curtains, or some with purple printed flowers, I've had dark purple curtains in my old house (3meter high ceilings) and it looks really dark when they're closed. Add a purple sofa or lots of purple accents to keep it calm and friendly. You could paint the window wall a deep eggplant (not the other walls because of light) with creamy curtains.

A houzz contributor, not too long ago, had made a wine rack out of 4'x4' wooden pallets, that are used in the US to move a load of goods with a fork-lift truck. Perhaps they have them in your country. He cut them in half so they were only two feet deep and stacked them up to high counter height. The wood would be a nice contrast with your concrete, might add a little warmth to the space. cascio.offsite@gmail.com

What kind of a look are you looking at for your house. A minimalist modern look or a contemporary ethnic look. First and foremost you need to do away with the current drapes and replace them with fabric blinds or light curtains so that there is some natural sunlight in the room. Paint the entire room white so that instantly brightens up the room. The long 27ft wall can be wall papered with a bricked look 3D wall paper on light grey or beige or just a textured wall in beige or grey. Also removing your sofa from there will open up the space. The current drawing area can be used as a foyer/entryway with just a bench and a shoe rack. Rest of the details I will share after making a rough plan with all furniture placement. Also what is your budget for renovation.

Hi Rajesh, We are in interior design firm based out of Pune, We take complete turnkey projects in Pune and design projects across the country. We have had design projects across Chennai, Cochin, Goa, Delhi, USA among others. Please go through our projects to gain an idea of our work and design style. We're looking forward to working with you! Best, CUBSpaces Team 9923893771