Build your colors gradually, and layer them. Apply a light undertone, and build darker colors slowly on top. Crayons can actually be more difficult to layer with due to the high wax content. Don't confuse them with colored pencils! If you want the "look" colored pencil, just use that instead.
Embroidery Tinting with Crayons, Colored Pencils and Paint. When filling an area of embroidery, we usually think of fill stitches like the basic satin stitch or long and short stitch. Another way to add lots of color to your stitching, without lots of labor, is to use a technique known as embroidery tinting.