Looks like Sweet Purple from Paradise Seeds. Never smoked the bud before but I'm starting my first grow soon and know all the purple strains pretty well. Hear is the info from the Attitude Seed Bank Page.
Sweet Purple is a hybrid of 3 varieties: a purple variety, an early-finishing / large-yielding Dutch variety and an exceptionally potent strain. As the name implies, this strain most of the time keeps the coloration of the purple parent, while gaining sweetness from the Dutch part of the family. This mostly Indica mix was especially bred for outdoor gardens in temperate climates. Sweet Purple is a strong variety that has the additional benefit of resisting mold. These vigorous plant stand up to cold, wet climates and grow to a full height of about 2.5 meters (8 feet) and can yield 500 grams per fully matured plant. Sweet Purple shows some variation, and potency can vary from average to wow from one plant to another. The coloration also ranges, with some plants turning completely purple while on others, only the buds take on that royal hue. Sweet Purple has a strong herbal, minty bouquet, and a sweet taste underlined by a slight iron-like tone. The high is a pleasant bodily sensation, but also retains a lucid edge that may increase your sense of concentration.
Hope that helps! Go to the site and check the pics too, looks just like what you got! Hope it smokes good!