In the last couple of years a number of the big packaged food companies have started an effort to remove artificial dyes from their products. This sounds like a pretty good deal, right? For consumers it certainly is but the food companies it’s been a difficult task.
One of the big advantages of using artificial dyes is their predictability, something lacking from dyes made from natural sources. Particularly difficult is the color blue, which is rare in nature to being with. Candy company Mars has spent years developing a blue M&M based on natural blue dye and they’re still at it.