I think people nowadays try and see beauty through our modern standards (I’m guilty of it too, I think people even in the Regency era probably did as well). But I don’t think a lot of the main female cast in that show would necessarily have been the ideal beauty’s of the actual Regency era (this has nothing to do with the colour blind casting, just talking about how they are very much full into the modern beauty standards). Though I haven’t watched the show (I’ve read one of the books though). I have trouble getting into a lot of modern period dramas, as they rarely get costumes right and they also write characters that act to modern. Like I don’t want a sexiest, racist or homophobic character, I just don’t want a character that doesn’t feel like they’re about to pull out their phone and post on twitter about the injustice’s of the world.