“A theme consists of three elements:
Colors: A set of colors is chosen to format the text foreground and background,
ANY GRAPHICS OR DESIGN ELEMENTS IN THE THEME, PLUS HYPERLINKS.
Fonts: Two fonts are chosen as part of the theme — one for the heading
styles and a second for the body text.
Graphical effects: These effects are applied to any graphics or design elements
in your document. The effects can include 3D, shading, gradation,
drop-shadows, and other design subtleties.