Blue, by its meaning, its an important color in art, and therefore in photography. Plus, it is present all over: the sky and the water take up a lot of space… (we live on the Blue Planet, right?). Let’s talk about the use of color blue in photography and see some examples of photos with loads of pretty blues.
Blue Blue World – The aesthetics of using the color blue
The blue tone of the evening creates a mystical atmosphere. That for the natural blue.
But artificial blue goes to architecture and technical objects. By using the color blue as negative space in you photos, you create the illusion of a deep space (human brain identifies objects with cold colors as being farther). If we can say that an image done only in blue tones gives a feeling of calm and peace, if you also use a complementary color (red, orange, yellow), the red spots tend to appear closer than the blue-green background.
How to obtain more blue in your photos
The easiest way to obtain a fully blue toned picture is to add a blue filter in front of the camera. However, if you don’t want the entire picture blue, but just parts of it, there are other filters that come into good use.
A red filter in front of the flash will highlight a tone in a blue illuminated environment.
If you use a polarization filter, light blue turns into dark blue.
Note: the filter effect is greater if the angle between the sun light and the direction of the photographer is 40 to 60 degrees.
Another way to make use of the color blue is to change the white balance to a cold temperature.
While post-processing your pictures, some photographers like to give their photos a cyan-colored tone after the black and white conversion. 
Winter is the season of the year when the blue color is dominant. You don’t even have to struggle to obtain a photo with a lot of blues when there is snow settled on the surface of the earth. That is because the shadows of all objects, when cast over the snow, will be a dark tone of blue, and the white show from the highlights will reflect the blue of the sky.
