Discussion of the change has become so prevalent it got its own Twitter moment. However, the change dates back to January 2016. That's when General Mills announced the world's seventh-best cereal would undergo a sweeping color change for the first time since its initial release in 1954.
General Mills removed artificial flavors and colors from artificial sources at that time, which included the removal of fructose corn syrup. Fruit and vegetable juices are now used for flavoring, while spice extracts provide the color.
Trix wasn't the only cereal that got a facelift, but it's quite easily the most noticeable since it originally looked radioactive. Reese’s Puffs, Cocoa Puffs, Golden Grahams, Chocolate Cheerios, Frosted Cheerios, and Fruity Cheerios were a part of the overhaul as well.