Jonathan Adler really knows how to feed a girl's obsession with customizing and monogramming. On his website, you can easily design your own monogrammed throw to match your color scheme. Don't even get me started on designing the rugs. I could play all day on his website. Here's my design - but a little to steep for my budget at $250.
Jonathan Adler's Richard Nixon throw's are beautiful and come in a ton of colors.
If that is not in your budget, here is a great ikat throw blanket that would surely jazz up any sofa.
Coco Cozy also makes a nice version of a geometric blanket in a wide array of colors.