I don't use wine as the lye water to make my wine soap anymore. They cure to the butterscotch color. You can add the wine before pour. When I make wine soap I hot process and then add the wine after the gel phase, if I think its got too much water I just let it cook off for a bit. I get soap that comes out the same color of the red wine this way. I believe its the active lye destroying the color.
The one time I tried to use wine as lye water it did this really interesting thing where the soap was butterscotch, but after I put it in the mold, it was sweating red wine. Lol, how was all that red hiding. Ok, get this, I even sliced that loaf up, no red to be seen, anda short while later all the bars were sweating red like they were bleeding. Some kinda voodoo.