When you click on links to various merchants on this site and make a purchase, this can result in this site earning a commission. Affiliate programs and affiliations include, but are not limited to, the eBay Partner Network.
You'll have to use vinegar so the dye is etched into the wool. or buy a special dye for it. Procion dye? I think that's the brand name that has a mild acid in it. Otherwise even the cheap RIT dye works well with vinegar. Getting the shade right is another story. Mixing dye is different than mixing paint because it's very transparent and you'll need a good understanding on how colors work together to even get it close.
50/50 with the dye amount would be pretty good IMO. The water bath is, of course, a much larger quantity.
Doing this on the jacket might be tricky.
Interesting idea.
Dave