The reason it isnt the dark purple color is because of the type of grapes you used. My inlaws make grape juice and they use two differnt kinds. Some of the grapes which were more famously used to make wine turned out a lighter color and then they had concord grapes that tuned out more purple and those are more traditionally used for grape juice. Both were good. So, your grape juice should be just fine. I am glad to see you taking over the blog. I need to know what is going on over in trumania. Love you guys!
just let it ferment for a year or two ... then it will be great!