Colors

[mjarvis]

It could be beneficial to provide some default view for displaying colors.

Perhaps this could be done by providing a static exhibit builder:

extension Exhibit {
    static func colors(name: String, section: String = "", colors: [Color]) -> Exhibit
}

This exhibit could show a list of the Colors.
It would be good to take this further, and allow a string name for the color, and also display hex / RGB values.