The key to good Crazy Quilt design is choosing fabrics of like intensity but varied hue, texture and pattern. Fabrics tend to change intensity in relationship to other fabrics - for example, a medium blue fabric can darken next to and intense navy or lighten next to a clear sky blue. Think of creating an artists' palette as you choose fabric for your Crazy Quilt, and look at each one as it relates to the others you have chosen. Remove any that don't seem to live in harmony with the rest. Hue - Crazy Quilt can successfully vary from monochromatic to rainbow hued if contrast and balance are carefully considered .
Contrast is intensity, as discussed above.
Balance relates to your actual color choices. Texture - refers to the feel of a fabric. A woolly tweed would have a rough texture while a bridal satin is smooth. The goal is to strike a balance between too much variation in texture and too little. Select a range of three or four textures which vary only cotton prints, wool or similar fabrics you will want to rely on variation in pattern rather than texture.