Zodiac Leading an Antarctic Cruise Ship Through the Lemaire Channel. I had never seen clouds this color blue before, and they were that color blue. I am guessing it is blue light reflecting off the glacier. Image taken with a Leica T camera and 18-56 mm lens (ISO 100, 31 mm, f/11, 1/40 sec). Image processed with Capture One Pro 8, Focus Magic, and Photoshop CC.