Monotone
Use these functions to automatically create a consistent color palette for your slides, based around a single color.
style_mono_light()
A light theme based around a single color.

style_mono_dark()
A dark theme based around a single color.

style_mono_accent()
The default xaringan theme with a single color used for color accents on select elements (headers, bold text, etc.).

style_mono_accent_inverse()
An “inverted” default xaringan theme with a single color used for color accents on select elements (headers, bold text, etc.).

Duotone
These themes build from two (ideally) complementary colors.
style_duo()
A two-colored theme based on a primary and secondary color.

style_duo_accent()
The default Xaringan theme with two accent colors.

style_duo_accent_inverse()
An “inverted” default Xaringan theme with two accent colors.

Solarized
There are also two themes based around the solarized color palette, style_solarized_light() and style_solarized_dark(). For both themes, it is advisted to change the syntax highlighting theme to solarized-light or solarized-dark (looks great paired or constrasted).
style_solarized_light()

style_solarized_dark()

To do this, your YAML header should look more-or-less like this: