As you can see, the darker, “purer” chocolates have the highest levels of toxicity. This just means that the darker the chocolate, the more Theobromine and Caffeine it has.
White chocolate is still technically "chocolate" in the typical sense. It is made with Cocoa Butter. While it lacks any cocoa solids, it still gets part of its ingredients from the same place.
This means that you still need to worry about feeding Fido that white chocolate just as much as dark chocolate. Although, it will take a much, MUCH larger amount of white chocolate to cause the same issues.
So, can dogs have white chocolate? No. It is still dangerous to give them any amount of it.
The next question you probably have is “how much chocolate can my dog eat?” This of course depends on a whole range of factors, but we actually answer that in a different article. You can find that here