Pages: Add more overlay color options for Background videos.

Right now, when you choose to use a video background, there is a "Video Color" option which adds a transparent overlay on top of the video, to aid in making text stand out. The only options are "Dark" and "Darker". I would like to see either:

1) Good: "Light" and "Lighter" options added that use white instead of black.

or

2) Better: The ability to choose the color of the overlay ourselves from the color picker.

Thanks.