A lot of quilters will use solid fabric for the largest parts of their quilt. Solid fabrics come in a rainbow of colors. You also want to stick to solid fabrics if patterns are not an important part of the project. Patterned fabric can sometimes take away from the actual pattern of the quilt. Keep in mind for beginners though that solid fabric is infamous for showing errors. If your project does involve patterned fabric then you need to carefully select the print. Large prints should be used only for large features of the quilt or for large borders or else the images will be lost. Similarly, small prints are good for small parts like making blocks as well as sashing, binding and backing. Striped, checkered and similar patterns are good for more narrow borders, sashing and binding. They can also be used to make really exciting blocks.
Monochromatic quilts can look amazing because they are all the same color, but different shades and intensities of that color. The finished product will look very artistic as well as modern, especially if you choose an edgy quilt pattern. You will want some solid fabrics as well as tone