I was curious about the origins of pink lemonade and my research landed me on this smithsonianmag.com article: The Unusual Origins of Pink Lemonade.  This article offers two possible origins: The first suggests that in 1912, Henry Allott, a circus owner, accidentally dropped red-colored cinnamon candy in a vat of plain lemonade. Allott went with it and sold the pink lemonade, which was a big hit! The second possibility is a bit more disturbing. In 1857, while Pete Conklin was selling lemonade at a circus, he ran out of water which he needed to make more lemonade. Conklin found a bucket containing red-tinted water (a circus performer had wrung her red stocking in the bucket). In desperation, he decided to use this dirty, tinted water to make more lemonade, and thus pink lemonade was born!