Most people equate blue skies with summer days, but the truest blue may be found on a clear winter afternoon, when the sheer frigidity of the air lends a crystalline clarity to the sky, and the sun and the atmosphere are free to work whatever scientific alchemy is required to bring out the deepest and most glorious shades of blue known to the eye. Echoed by the fallen snow seen here, the effect can be a double dose of blue sky, where it bounces off the shadows, saturating and challenging the spaces where the ease of gray usually resides.
