The results of the Default character style depend on the properties of the character tag. The Default tag checks the properties of the tagged text and attempts to match those settings in the HTML output. For example, if the FrameMaker character tag Blue (which sets the color to blue) is mapped to the Default, the resulting output would match the output generated by FrameMaker (that is, the color would be blue). The Default style checks the color, font size, and font of the original style and includes those properties in the output HTML.
Note: Even if the font is specified in the HTML, it won't be displayed for an end users unless users have the specified font installed on their system.