I can;'t speak to that particular brand but years ago Bill Knight gave be a bunch of plastic baggies filled with all kinds of interesting things. NO, nothing one might choose to smoke thank goodness. One of them was a big hunk of alkanes root, probably the size of a really big dill pickle. I used it for a lot of experiments and finally figured out how to get a decent reddish-orange (subtle) glow; when boiling up a batch of oil with some form of lead as a drier, after skimming off a lot of the sludgy $#@* and boiling for a bit, I dropped a hunk of the alkanet root about the size of a half-dollar into the boiling oil and left it there for another 15 minutes or so iirc. It was weird because it created a lot of foam and scum to skim off, but once I stopped boiling, let it cool down a bit and then filtered it out, the oil was a very deep red-orange, much more so than usual just by boiling with lead (the leaded boiling process always seemed to add some orange tones). Now I don't do much with walnut as I hate the stuff, but it definitely was adding color to maple stocks finished just with aquafortis. Nothing crazy or WOW or anything like that, but there was definitely a difference between the alkanet oil and just plain oil.
BTW it STINKS to high heaven.
I started to do some experiements with lightfastness but got completely distracted with other things and never got back to it. I do know that after a week or so in the full sun on a piece of white paper, the red-orange was losing some of the red and going more brown. Bill Knight might have some more info on this if he's still posting here.
If the stock is being stained with aquafortis, and you want a bit more red, basically the same effect can be obtained by using a really dark seedlac or garnet lac sealer. That will add some red-orange also. I like to mix up my shellac based sealers with heated alcohol to supersaturate them and then thin back from there.
Lots of other resins to play with as well, too much to go into here.