Wipe household ammonia on your wood and it will darken instantly.
I build flintlock rifles, we commonly use a ferric nitrate stain on maple to bring out the figure in the wood, I tried it on several bow woods to see what happened. This stain is applied wet, allowed to dry and heated to cause the stain to react with tannins in the wood to produce the final color.
Hickory, a very pleasing color;
Osage light coat; I think, this may be a picture of osage with the the stain just applied before I blushed it with heat, I don't remember.
Osage heavy coat, blushed with heat.