Some colors are more transparent than others. Some colors are very opaque. Test your colors on a separate piece of paper to see how they work together. Too many layers of crayon can make the colors resist each other. This can make it harder to add more color. Use as few colors as possible to get your end result.
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.