matching kitchen cabinets
How old are the existing cabinets? Do you know what type of finish is on them? The finish can affect how closely they match, as well, even if you nail the color perfectly.
Take a door or drawer front to a local paint store, Sherwin Williams or Porter Paints for example (I prefer Porter myself). If you have a couple scrap pieces of oak, bring them so they can test it. Don't be afraid to tell the person matching it if you don't like it, you're the one that will have to look at a poorly matched stain color every day if you accept it. Don't forget adding a finish over the stain will deepen the stain color, too.
The above response is true, especially better quality cabinets will have a multiple step process to achieve the stain color, often times spray toning being one of the last steps before the finish coats, but you should be able to get it pretty darn close. Do some tests on some scrap pieces of oak, try some different methods and see what works before attempting to stain your new cabinets.