I've never used an interior decorator, but I do know of one because she has a weekly section in the Daily Sun. The colors she uses often are brown and light blue, which are the colors I like using. If you pick up a Sunday newspaper, she'll be featured in the Lifestyle section. Her name is Ruth Dyer, here's her website.
Finishing Touch – Home Decor by Ruth Dyer
Here's a bedroom that she did on her website.
This my living room which I decorated, browns and light blue seem to work good together in Florida.