As a subject matter expert in the history of confectionery products, I can provide some insights into the topic of blue Smarties. It's important to note that the color of Smarties, which are small sugar-coated chocolate confections, has changed over the years due to various reasons, including safety and availability of certain food dyes.

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Nestl�� Rowntree stopped producing the blue version of the chocolate beans in 2006 because it is removing all artificial colours from the casings and it couldn't find a natural alternative to the blue chemical currently used. It was replaced with a white Smartie.read more >>