Color is expressive and emotive all by itself. A fantastic design structure is important too, but color alone can evoke powerful responses. Advertisers know this and use it to their advantage. The fashion industry clings to seasonal color forecasts, and interior decorating schemes have their own chronological palettes -- anyone want to take the paneling down in my kitchen to see the avacado, gold and tangerine wallpaper? Artists often have their own palettes that they frequent. A good resource on color schemes is Color: Messages and Meanings by Leatrice Eiseman. While this is from an advertising perspective, the presented color schemes and interpretations provide a jog to the creative machinery.
What happens when you focus on only one color, with all its glorious variety? I love the book Red by Beaney and Littlejohn (Double Trouble). It is about explorations in fiber using red as the primary color. Having the theme of a color gave the artists freedom to experiment with subtle tone changes and intricate pattern work. They most definitely were not "stuck!" I have a book that was given to me when I was in Istanbul - not on amazon - by of all companies, Mavi Jeans. "Mavi" means "blue" in Turkish, and the photo book chronicled the color "blue jean blue" in all its variety and nuance. Certainly there is a work of art in there for an artist bereft of ideas.