They were everywhere this morning, those periwinkle pockets of light in the snow. They glow as if lit from below.
When I see them I always think of the art of James Turrell. I saw his work the first time I ever went to the Whitney Museum when I was in High School and I never forgot it.
Now I think of his light sculptures when I’m shoveling snow.
When I looked at the photos I took of the reflected light in the snow, I thought they could just as easily be a picture of a cloudy sky with hints of blue peeking through. 
Lovely! I don’t remember ever seeing this when I shoveled snow. (I grew up in Iowa, was usually just trying to get it off the driveway.) Thanks for noticing and taking photos.
I get that Ardene! I actually never noticed it till the past few years. I guess I was just ready to see it.