Red dye (#10?) might have been the most recent nasty dye, but there have been many.
If you have a collection of paints like an artist might, a look at the labels will show how many colors are toxic and the base chemicals are or were, depending on findings, used in dyes.
Well, look at China. Lead brightens colors and they’re still using it. China exports most of the toys they make because even Chinese won’t buy them.