You should note, that Republicans only decided to go after artificial colors
after the industry had already solved this "problem" for a hundred other countries.
Meanwhile, all this hubbub over "artificial" vs "natural" colors is fucking nonsensical. Very very few of the "artificial" colors have some evidence of maybe causing some harm from chronic exposure. Not that you should have chronic exposure to any of these foods in the first place since the sugar and fat and salt content alone is unhealthy and will cause you significant chronic health problems unless you exercise for a couple hours a day.
But it doesn't matter whether a chemical is produced by some process in nature or some process in a lab. What matters is how the human body reacts to it. Do we have tomes of evidence that eating "natural" colors is actually safe? No, we do not. Most of them are just GRAS (Generally recognized as safe, which is an outright misnomer) and therefore have no evidence of any safety other than "We used in the 50s so whatever".
Nevermind that "natural" food dyes aren't even! To make "natural red #4" involves taking large amounts of carminic acid from some bugs and reacting that with aluminum or calcium salts. In fact in the US, you can do pretty much whatever you want to a naturally sourced chemical and still call the product of that chemistry "natural".
Replacing well studied, simple, dyes with less studied dyes just because a core part of their chemistry was able to be sourced from """Nature""" is utterly stupid and pointless and meaningless. What actually matters is replacing ingredients that show some toxicity to chronic exposure with ingredients that have significant data to show they are not chronically toxic. There's no structural system in "natural" dyes to actually do that.
This push will not stop Dupont from extracting curcumin from turmeric, massively modifying it to make it easier for an industrial process to use without fouling up their equipment, accidentally make it cancerous after you eat it for 20 years, and poison us all with a "natural" chemical for decades.
"Natural" has no structural overlap with "Isn't unhealthy". Organic Ricin will kill you just as dead.