Skittles consumers really will be able to 'taste the rainbow' in its entirety now that Mars has introduced a blue Skittle. The limited-edition sweet will be flagged up on packs with an extra blue stripe in the rainbow illustration, and a call to action to visit the brand's Facebook page to follow the Blue campaign and win prizes. One of the competitions featured will involve quizzing people on the flavour of the new blue Skittle.

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