The Rainbow Project 2015 The Wild Beer Co + Firestone Walker + Violet 7 breweries from the UK paired with 7 breweries from the USA and paired with one of the 7 colours of the Rainbow creating the theme of the brew. The Result…. Violet Underground Bringing you the very best in collaboration: proprietary yeast from Somerset cider orchards Californian raspberries and French candied violet petals. Blending the barrel aged powerhouses Somerset Wild and Cowbell together created a tart sour bomb with nuances of wood hay and plenty wild character. Mouth-watering and thought provoking - Drink Wildly Different.