Shadows are alwaus more blue shifted on color negatives. Thats because the world is more blue in the shade then in the sunlight. When the negative is thin the scanner has no point of reference (or less of) and tries to match up to the closest possible option.
Easy to find your white point in photoshop by finding the brightest point (hold ALT down while sliding the white marker in the histogram/levels), then select the white pipet and click that very first white pixel. All other color balance should fall into place.