The blue/cold look is most likely not something you changed in-camera. With color negative film, a strong blue cast usually points to a lab scanning/color-balance problem, though bad film storage or processing can also cause it.

A few clues from the examples: the highlights look washed out and the frames appear grainier than usual, which suggests overexposure may also be part of the problem. So you may have two things going on: exposure running a bit hot, plus poor scanning or film handling/processing.

Most likely causes:

• lab scanner/color balance error
• processing issue at the lab
• film that was old or improperly stored
• some overexposure from the camera/meter

What to do:

• Ask the lab to rescan the negatives.
• If possible, inspect or scan a negative yourself and invert it without color correction. If the blue cast is only in the lab scans, the scanner is the culprit; if it’s in the negative image too, it points more to film/development.
• Try correcting the scans in editing; several people noted there’s still recoverable image information.

The softness/ghostly faces are likely a separate focus or motion issue, not the cause of the blue color.