Fabrics

• Soften the look of a brown leather couch by choosing decorative pillows in the right fabric. Choose decorative pillows in fabrics such as velvet, faux-fur, faux suede and cotton blends. Using decorative pillows in these fabrics also adds texture to your leather couch and goes well with the casual but luxurious look and feel of leather.
  
  

Designs

• In addition to different fabrics, use patterned and printed decorative pillows with a brown leather couch. The patterns and prints you use can set the theme for your room. Mixing and matching prints such as florals and stripes, for example, creates an eclectic theme. Or, add a modern touch to your room by decorating your leather couch with pillows in an animal or geometric print.
  
  

Colors

• The color or colors you choose for decorative pillows depends on the look and feel you want in the room. Warm colors, such as red, orange and yellow, are vivid and energetic. Cool colors, such as blue, violet and green, create a calm and soothing atmosphere. Any color goes well with a brown couch, but choosing a color scheme, such as using monochromatic colors or complementary ones, can help you to decide on specific shades.
  
  

Sizes

• The size of the pillows you choose depends on the size of your leather couch, and choosing the proper pillow sizes creates proportion. If you have a smaller couch, pillows that are too large creates too much bulk; if you have a larger couch, using small pillows won't cover enough surface. Create balance by decorating with pillows that are about 17-by-17 inches for a smaller couch and about 22-by-22 inches for a larger one. Likewise, you can mix and match by using two different-sized pillows proportional to the size of the couch.