Create a set of hyper-realistic watercolor texture cliparts with a witch birthday theme. Each image should feature a different color palette, adding variety and vibrancy to the collection. The cliparts should include elements such as a cute witch holding a broomstick, a big cake with candles, cupcakes, and various desserts, all rendered in unique pastel colors. Each element should be isolated and placed on a white background, with a margin separating them for easy use. The witch should be depict