If you wanted to see a darker shaded Full French bull you should have seen Tee Anchor Aiglon. He looked like a Pie Rouge Simmental when wet. That said I never seen Hereford markings on a purebred Charolais to this degree. This shows one of the biggest problems the red factor cattle have showing white. Some of them look like lighter shaded Maines. A bull called Onaway Stonewalker was known for putting plenty of white including white faces on red factor cattle. This bull is straight domestic breeding so I suspect he acquired this Hereford markings from a few distant ancestors.
The French in WWII took their best breeding stock and put them in the ALPS to keep them away from the Germans. Np fences to speak of there just hoping the herders could keep them apart. In fact so many cattle did end up with crossed pedigrees that a new breed to accommodate the crossbreds was formed- the Blonde D' Aquitaine. Go look at the variation in the cattle imported and you will see what I mean.