Accessories which would go nicely with a blue sofa could be a nicely painted wall to start of course, or paintings or murals or pictures in absolutely any color or colors you feel would complement the room and work together with the sofa. Other accessories would be lighting, such as lamps, chandeliers or candles, and flowers in vases on side tables. On the sofa, throws or pillows add a nice touch. You can add just a few accessories or mix some of them together. I just included idea options, not necessarily that it has to look like that all together. I gave examples and ideas of chandeliers someone might want to choose from. I'm not suggesting you use more than one chandelier in a room, I'm just showing what kind of individual chandeliers or lighting fixtures could look nice in a room with a blue sofa and also what lighting could work with a purple mural or purple wall. I'm just showing what colors might work together in the room where the biggest piece of furniture is blue. So the fun purple galaxy mural is of course from the blue family as well, and because it's also from the red family, I used pillows in pink and purple and blue tones, with some touches of yellow, greens and golds. I love pink with blue, so I added throws, one with mixed colors and a pink throw also. I think the lighting fixtures, the chandeliers and the Tiffany lighting colors go well with the purple mural and blue sofa. I added pops of yellow with the side tables and flowers as well. I love Tiffany lighting, the beautiful colors of the stained glass and love their flower designed lamps. I added a bottle of perfume, a pretty floral tea cup, a bucket of bubbly, a tulip lamp, truffles in a gold container, gold sunglasses, a gold pair or heels and a beautiful Persian kittie, as possible fun things to add to a room with a blue sofa