Good morning Donnie and John, you could find the wood dye in any craftshop or hardware store. They are water based and you can adapt the deep of the color adding water to them.
For instance, I use the red for the inner parts of the hull, some details of the deck as well as the carriages of the cannons, but the red is very impacting so I apply a glaze of very dissolved wengé dye to make this parts dirty due to the use.
Other very useful product (for me of course) is the "bitumen". Soaking the standing rigging in it you can achieve a very realistic color and also a convenient rigidness.