adjust_color($color, [$red], [$green], [$blue], [$hue], [$saturation], [$lightness], [$alpha]) Increases or decreases one

green($color) Gets the green component of a color. Calculated from HSL where necessary via

counters($args...) This function only exists as a workaround for IE7‘s

saturate($color, $amount) Makes a color more saturated. Takes a color and a number between 0% and 100%, and returns a color

map_remove($map, $keys...) Returns a new map with keys removed. Like all map functions,

list_separator($list) Returns the separator of a list. If the list doesn’t have a separator due to having fewer than two

darken($color, $amount) Makes a color darker. Takes a color and a number between 0% and 100%, and returns a color with the

complement($color) Returns the complement of a color. This is identical to adjust-hue(color, 180deg).

is_superselector($super, $sub) Returns whether $super is a superselector of $sub. This means that

map_has_key($map, $key) Returns whether a map has a value associated with a given key.