The only thing I’m missing here is why the color temperature measurements are “backwards”.
Light with a color temperature of 2850 Deg K is much, much “warmer”, (read way redder), than light with a color temperature of 7500 Deg K, which is quite blue. Noon daylight is considered to be 5500 Deg K. A clear blue northern sky has a color temp of in excess of 10,000 Deg Kelvin.
The old tungsten photoflood bulbs had a color temp of 3200 deg K, and if they were used with daylight balanced film, the results would be extremely RED.
The reverse is true with using tungsten balanced film in daylight, pictures would come out almost totally blue.
The film’s color balance was a constant, not so with the auto white balance of a modern digital camera. or (?)
So, if the white balance of the >>camera<< was 2850 Deg K when the photos were taken in daylight, then that would explain the blue color…! Or that;s at least one plausible explanation.