Southwest Style Bathroom . Chair of the asid national board, designer kerrie kelly. Most southwestern decor is very homey and rustic—think deep, warm colors and rich woods. 25 Southwestern Bathroom Design Ideas from www.thewowstyle.com Chair of the asid national board, designer kerrie kelly. Change something in your bathroom and choose new and unique southwestern shower curtain with bronze and blue color palette. Which is practically all shades of brown.