Here is my suggestion: You can develop an "eye for color." Take an afternoon and go to a bookstore that has a coffee section (in the States we have Barnes & Noble Bookstore, as an example). Go to the magazine rack. Gather EVERY quilting magazine in the rack. Find a table. Purchase your beverage of choice; coffee, tea, soda. Bring a notebook and pen. Take you time and flip through the magazines, paying attention to color and fabrics thrown together in quilts. Notice what "draws you" and what does not. This will help you define your own "colorway."
Jot down color combinations in your QUILTING JOURNAL (everyone should have one!). As an example, you might simply write: "Eggplant (deep purple)/yellow, orange." Certainly you may have never thought of putting these colors together, but the combination pleases you from what you see in the magazine. Believe me, you will slowly begin to grow your color confidence.
There's something else, too; the color wheel. Look at opposites on the color wheel. Did you know red and green are opposites? Merry Christmas! Now you know why these colors work so well! And, by the way, purple and yellow are opposites, as well!
Hope these tips were helpful!