Of course as a photographer you never leave without a camera. Doesn't matter what you have on hand (cellphone, dslr or film), but I always take something with me just incase. An article for blue hour popped up on my Facebook timeline. I've known about it, because skies is such a beautiful thing to capture. One of my favorites are purple skies, but this blue hour is amazing, especially here in Texas. A few samples I've included as the transitions before night time.