The colors are not the same. As others have mentioned it depends on the manufacture. Do they use equal part or just highlight the color when adding the second color. I always take a swatch with me to match colors if I am not using the same manufacturer. I order the majority of my fabrics on line now and occasionally I get a blunder when trying to match a color. I don't order much fabric anymore and am working from my stash now to use it up. It is amazing when I find in there.