As an artist and a quilter, I recommend you get a color wheel. Color schemes using analogus colors or complimentary colors. Analogus colors are those on either side of a chosen color and complimentary colors are those opposite a particular color on the color wheel. You can also use a split compliment scheme which means you select the color directly across from your main color then choose the colors on either side of that. Another means of selecting colors is to pick a print that you like then select you other lights and darks from the other colors in the print.