All of the example photos could have been made without any selective processing with regard to color temperature/white balance. They all look like they were made with several different types of light sources in the scene. If one light source is very orange and the other is very blue, the camera will see the difference much more so than our own eye/brain systems will.

In any of the below images were the color temperature and white balance set at a point in between the two light sources (rather to make one or the other look "white") the warmer one would look yellow/orange and the cooler one would look blue. If the color saturation were increased the differences would be even more notable.

Here's a photo I took at a football stadium in which the lights illuminating the field were much bluer than the lights illuminating the concourse area behind the stands. The only editing adjustments made were global which affected all parts of the picture equally.

When corrected for the very limited spectrum orange vapor lights (well beneath 2000K which necessitated use of the color picker) under the stands the light on the field looks very blue.

Yet when properly balancing color for the lights on the field at 3600K the color looks very natural.

Again, look at the press box as viewed with the white balance adjusted for the orange lights.

Now look at the same photo with the color temperature of 3600K used for the photo taken on the field's surface applied.