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Sorry, but bleach will do just that. Your oak will be a sickly washed out color and oil will not color wood. Applying a stain will only make it look uglier.
Two remedies would be to a) remove the wood and, if flat, run it through a planer taking just a wisp off each pass until you get to undamaged wood and finish per item b and b) the best is to replace with new oak. Do not stain at all but put about 3 coats of UV urethane on. The first coat or two will soak in and seal the wood. The last coat will protect the wood. Even though this will protect to a good extent, it will not last in an open environment. But it's the best game in town. And do not use an epoxy 2-part boat finish.