Named list of CSS declaration blocks, where the names are
CSS selectors. It has a format() and print() methods, which you
can use to write the output to a CSS or HTML file.
Arguments
colors
Whether or not to include colors. FALSE will not include
colors, TRUE or 8 will include eight colors (plus their bright
variants), 256 will include 256 colors.
palette
Character scalar, palette to use for the first eight colors
plus their bright variants. Terminals define these colors differently,
and cli includes a couple of examples. Sources of palettes: