From your initial post I would assume you have not tested the marks to see if they come out. You should be able to do this on the printing of the selvedge and not on the design. Identification of the company producing it or the printer would be helpful. A lot of the newer embroidery is being printed in wash out ink. Too much unknowns here to give a really informed suggestion. As to the color it is printed. The blue can vary depending on the printer and the color of the printing does not indicate the color thread to be used. Just beause it says "red work" doesn't mean it has to be embroidered in red. Red Work is the traditional name for this type product.