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

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

inspect($value) Return a string containing the value as its Sass representation.

unit($number) Returns the unit(s) associated with a number. Complex units are sorted in alphabetical order by numerator and

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

round($number) Rounds a number to the nearest whole number.

adjust_hue($color, $degrees) Changes the hue of a color. Takes a color and a number of degrees (usually between -360deg

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

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

lighten($color, $amount) Makes a color lighter. Takes a color and a number between 0% and 100%