Text: Paragraph Styles
The pencil button allows editting the properties.
The fill color can be a custom color, or a predefined swatch.
Text: Character Styles
A swatch is a color saved inside a Stylekit. You can reuse the swatch (predefined color) in paragraph- en character styles.
Define a color, give it a name and save the named color to be used later in a style.
Select the font-book to view your fonts, and add them to the stylekit.
As of writing, Fonts are managed through the BackOffice of GraFx Publisher. Add them to a folder in the BackOffice, and they will appear in the selection window.