Use good quality crayons (Crayola works well) for the best results. Making the fill color darker around the edges is a good technique for adding dimension. As you work, don't press too hard. It's better to add layers of color than to have too much color that you can't remove. Take care to color evenly and without causing color streaks. When you're finished, place a piece of scrap fabric over the coloring and iron the paper on a high setting. This will heat set the coloring and remove excess wax.
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.