The camera's white balance definitely did shift. To my eyes, close to totality (on either side) the light was a bit redshifted. Not much, but a little. The cha

The camera's white balance definitely did shift. To my eyes, close to totality (on either side) the light was a bit redshifted. Not much, but a little. The change seemed symmetrical before and after. I've imaged the whole event. Looking at the disk of the Sun, the color is not the same everywhere. The edge definitely loses energy in the blue end of the spectrum - I believe for the same reason why blue light is dispersed more, compared to red, in Earth's atmosphere. So near totality, when you receive light only from the edge of the photosphere, it's normal that the spectral composition looks different.