IIRC they switched to natural dyes in 2017, but sales fell because average people are "shiny object" driven. So they reverted it.
The US parent company is also committing to it as well.
https://www.wkkellogg.com/our-impact/make-eating-well-easy/q...
https://www.fooddive.com/news/silly-general-mills-artificial...
I'm curious (as in HN curious discussion) whether this points to something greater about US culture.