+design
+------
+
+Default design (colors and background) for the site. Actual appearance
+depends on the theme. Null values mean to use the theme defaults.
+
+backgroundcolor: Hex color of the site background.
+contentcolor: Hex color of the content area background.
+sidebarcolor: Hex color of the sidebar background.
+textcolor: Hex color of all non-link text.
+linkcolor: Hex color of all links.
+backgroundimage: Image to use for the background.
+disposition: Flags for whether or not to tile the background image.
+
+notice
+------
+
+Configuration options specific to notices.
+
+contentlimit: max length of the plain-text content of a notice.
+ Default is null, meaning to use the site-wide text limit.
+ 0 means no limit.
+
+message
+-------
+
+Configuration options specific to messages.
+
+contentlimit: max length of the plain-text content of a message.
+ Default is null, meaning to use the site-wide text limit.
+ 0 means no limit.
+