Taking your cityscape photos during blue hour is always a safe bet if you don't get spectacular light at sunrise or sunset. A deep blue sky provides the perfect color contrast to the incandescent lights in the city and will help you create a pleasing result. But what if you are lucky with light and weather? Do you take a photo while the colors pop in the sky or with the city lights during blue hour? Luckily, you can get both by applying a technique called time blending. In this article, I show you how.