I paint. A large proportion of the pigments I use are indeed toxic, as the non-toxic substitutes are markedly inferior in both lightfastness and saturation. Lead is now quite uncommon thanks to zinc and titanium oxide pigments, but cadmium, cobalt, chromium and manganese compounds are widely used in high quality paints. In practice, this toxicity is a non-issue if you're sensible enough not to lick your brushes.

Chinese painters are probably less likely to use toxic pigments than their western peers for reasons of cost - a good quality cadmium paint is two to three times more expensive than a non-toxic substitute.

The paragraph preceding what you quoted also had this to say: "Cadmium sulfide is not very toxic (LD50 > 5000 mg/kg) when used as a pigment, although acute exposure to cadmium vapors from welding is harmful." In the case of these workers there are many details missing (whether they're using cadmiums, whether there is more exposure risk) but at least here in the US, all cadmiums I own are real and come with datasheets such as the one below:

http://d4of2brjuv1jo.cloudfront.net/assetfiles/f4fd8b8f-8fb5...

Azo colors, from manufacturers I am familiar with anyway, name their products as such ("Azo Yellow" instead of "Cadmium Yellow").

http://d4of2brjuv1jo.cloudfront.net/assetfiles/bad43b91-5026...

Regarding CSS color names, I would hope that anyone who actually recognizes the word cadmium would be aware that there pixel is not suddenly made of zinc and that their seagreen background has not suddenly become saltwater. Now if it were the other way around, i.e. the names had always been arbitrary and suddenly someone decided it would be a great way to stick hazardous chemicals into things..!

There is at least one popular brand that does use toxic chemicals: http://d4of2brjuv1jo.cloudfront.net/assetfiles/9fffc54c-1b49...

"Toxicological information: ... The soluble cadmium content in the pigment is less than 5ppm. Only large volumes may have adverse impact on human health."