If this is true, why doesn't it show up in paintings? Your source is written by a "color expert", not a historian, and she cites no evidence. The veins showing through pale skin theory sounds more likely to me.
Paintings were very expensive, upper class commodities. They frequently idealized their subjects.
One British king had portraits delivered to him of a potential mate and was disappointed when she showed up and wasn't as attractive as her portrait. One source mocked him for it, saying he should have realized it was probably idealized, after all, it was his own portrait artist he sent, a guy who had been making him look good for years.
Colloidal silver still sometimes causes blue skin:
"While silver is potentially toxic to humans at high doses, the risk of serious harm from low doses, given over a short term, is slight". If something does no identifiable harm, and is a sign of high social class, wouldn't "idealizing" mean exaggerating argyria, not hiding it?
Everyone here, including you, is dismissing the idea that it's actually harmful. Maybe the people who made those paintings didn't see it that way.
"Born with a silver spoon in their mouth" is not usually a nice thing to say. It usually means they are basically overprivileged assholes.
In chelation groups, metal poisoning is generally viewed as having a negative impact on the personality. Perhaps people who routinely dealt with "blue bloods" had enough first-hand experience to notice that visible signs of silver poisoning correlated to asshole behavior.
Anyway, I don't actually think the questions being put to me are in good faith from people sincerely curious about my knowledge or my opinions. I think the pattern of downvotes and questions suggests everyone here thinks I'm a clueless idiot and they are trying to politely let me know how stupid I am because civility is demanded by the rules of the forum.
So continuing to try to answer questions in good faith is likely making me look stubborn, pigheaded, difficult and so much of a nutjob that there is no hope of reaching me.
