Equally, mix & match your sofas, armchairs & single chairs. This is what gives your home decorating its individuality. There is no one else like you!.
Go & hunt around for colors & fabrics that you love & get some off-cuts or swatches of the fabric – bring it home & see how well they sit in your room & achieve your overall vision for your home.
Accentuate your room’s major feature item. A sofa is a major purchase item, & one that you will hopefully, have for some length of time. So, consider your choice carefully. The color you choose should not be ‘too wild’ or extreme, unless you have chosen to go really bold & unusual as part of your decorating theme for your room. Its better if you consider a sofa as part of the canvas of your room, with some leeway of course, that you can accentuate further with colorful cushions, throw rugs & other home accent accessories.