join($list1, $list2, $separator:auto) Joins together two lists into one. Unless $separator
str_length($string) Returns the number of characters in a string.
lighten($color, $amount) Makes a color lighter. Takes a color and a number between 0% and 100%
desaturate($color, $amount) Makes a color less saturated. Takes a color and a number between 0% and 100%, and returns a color
set Return a new list, based on the list provided, but with the nth element changed to the value given.
call($name, $args...) Dynamically calls a function. This can call user-defined functions, built-in functions, or plain CSS
saturation($color) Returns the saturation component of a color. See
if($condition, $if-true, $if-false) Returns one of two values, depending on whether or not $condition is true
unquote($string) Removes quotes from a string. If the string is already unquoted, this will return it unmodified.
index($list, $value) Returns the position of a value within a list. If the value isn’t found, returns null instead
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