Mission style furniture was a part of the Arts and Crafts era. The idea was to be able to go to a lumberyard and buy the material readily sized for what you needed. However, according to the parts lists included with some of the designs it is apparent that lumberyards would do more then than they will now. If you we search H. H. Windsor you may find free downloads of his 3 books. I have a paperback copy and they are usually cheap because the copyrights expired decades ago.
The dark color Tom mentioned was usually from fuming the oak with ammonia.
Someone I consider a master woodworker once told me that a master woodworker is not someone who never makes mistakes. He is someone who is able to cover them up so that no one can tell.