Blue in bright light
Natural light in photography is not as consistent as you may think. At different times of the day, different shades of the color spectrum dominate natural light. For instance, at midday, the blue portion of the color spectrum is dominant, producing a “cool” light. Color photography taken at midday produces the clearest, sharpest pictures in bright light.
In contrast, natural light at sunrise and sunset emphasizes the red portion of the color spectrum. Known as warm light in photography, sunrise and sunset light produces warmer pictures with a softer contrast.
~From the article Light and Color in Photography