There’s a debate at Stormfront over how many Swedes are naturally blond and there’s an anthropological survey where those with light brown/dark blond hair formed the majority with 62.5 % in Sweden and 50 % in Norway. Of course blond hair does darken to a degree depending on the individual and moreso if they’re genetically blond.
In the case with King Richard III, he was genetically confirmed to be blond and quite likely in the case with one painting he had light brown hair. Most Scandinavians could be naturally blond in a sense that they have the genes for it. Even if most of them are of the mousy blond variety.
If that’s the case, then blond hair’s not a big deal to them.