Lightbox: less dark vignette
Now that the search results have opaque backgrounds the main reason why we made the entire shell darker is gone. At the same time, this very dark background is causing some issues with dark overlays, e.g. app folders, because there's very little contrast:
I think it would make sense to make the background lighter again. @verdre and I were playing around with some values, and something like 0.5 feels good (and makes dark overlays discernible again):