Here's the results of that dough

Sourdough baking
Here's the results of that dough

Beautiful large loaves!
How much whole wheat do they have in the dough?
I do 350g whole wheat and 650g strong white flour, 20g salt, 200g starter (100% hydration) and between 650 and 700ml water, this round right smack in the middle with 675.
So about 1/3 whole grain for the rustic loaves, which to me makes them seem like white bread - they can go up to 50%, I do that sometimes with rye because I like that denser, and the flavor is better with more, I do not want rye to feel like white bread.
That's the long version, lol. Short version - 1/3 whole grain, 2/3 refined white.
It's really personal taste. I have been gravitating to more and more whole wheat. Now I do mostly whole wheat fairly often, with some VWG added to get a bit of volume.
Perfect Loaf has a good 100% whole wheat sourdough sandwich bread recipe, I have done that one. Extreme hydration - dough very sloppy, needs a loaf pan but it works well. That's the only whole whole grain one that I do. If I recall correctly the starter is still white flour so I guess not quite 100% but really close to it and tastes so good.