Before you color on fabric, be sure to pre wash, as the sizing in the fabric may act as a resist, and prevent the color from being permanent. Also, the result may not be as good as with 100% cotton fabric. I teach a color crayon class,and these are a few of my tips. Also , when washing finished project use mild detergent and cool water.
I also do a lot of machine stitching for embellishment, and it's beautiful. It adds texture, and design to your work. Enjoy.