Shadows of modal dialogs should be black instead of grey

[Donarsson]

The shadow of the modal dialogs (.yui3-pretty-overlay) in Launchpad (for example when you click “Subscribe someone else” on the right) is grey (#aaa), which makes it look unnatural, especially on black text and other dark elements.

To look natural, shadows of opaque objects should always be black (#000). The intensity can be adjusted by adding an alpha channel to the shadow.

I have attached two screenshots for comparison, the first one shows the current shadow, the second one has the shadow adjusted according to my proposal, with the alpha channel set to match the intensity of the current shadow while looking more natural.