If I do had applique, I use a q snap, pull it tight. But before I use the DMC, I vinegar wash it to set the color. i've been in the Embroidery guild for years, so even if i do a sampler, with red or black thread, I set the color with a vinegar was. Use a sharp needle (maybe a 9), and blanket stitch.
For machine, I do whatever color, blanket stitch or satin stitch.