Whether you're listing your property for sale or redesigning your bathroom for your own aesthetic enjoyment, swapping out the shower curtain with an edgy design is the easiest and most affordable way to quickly improve bathroom ambiance.
1) My favorite, this "Tree" Shower Curtain, in dark brown on a white background, is made of washable polyesterl and brightens up the room with a clean, simple silhouette.
Almost any color pairing can do. White towels will give the bathroom a minimalistic, refreshing look; coral pink will play up on the age-old "retro" brown and pink theme; sage green will invoke the outdoors and a peaceful aura.
Available at UrbanOutfitters online for $40, and a bargain for the impression it makes!
2) PlushLiving's selection of vintage-inspired modern shower curtains are serious showstoppers in the bathroom. "Links" Shower Curtain (second picture) in blue and white combines the best of old and new. PlushLiving's curtains come in a delightful array of colorful bursts, $36 at AldeaHome.com
If you can't match the towel colors perfectly (or close enough) the safe bet is to defer to white. While traditional and contemporary decor often involves an amalgam of colors, truly modern decor is palette sensitive, often either monochromatic, a pairing of two colors next to each other on the pie chart, or two or three smartly matched but strongly opposing colors.
3) Another superb pairing with either white or other strong colors (avoid pale colors, or you might get the "washed out look") is the Paris or Empire State Building shower curtains. These are stellar examples of "usable art"! They are engaging conversational pieces and will create flair in even the dullest bathrooms. Paris Shower Curtain or Empire State Building, $26 each. 
Trick: To keep costs low, purchase one to two new sets of towels, depending on how much hanging space you have. Use your old towels for showers and put them away when you step out of the house for a buyer showing. Leave the new towels out and in perfect condition. Fresh towels make the entire bathroom fresh! Modern=clean!!
