scale_color($color, [$red], [$green], [$blue], [$saturation], [$lightness], [$alpha]) Fluidly scales one or more properties

ceil($number) Rounds a number up to the next whole number.

opacify($color, $amount) Also known as: fade_in Makes

abs($number) Returns the absolute value of a number.

function_exists($name) Check whether a function with the given name exists.

selector_unify($selector1, $selector2) Unifies two selectors into a single selector that matches only elements matched by

alpha($color) Returns the alpha component (opacity) of a color. This is 1 unless otherwise specified. This

selector_replace($selector, $original, $replacement) Replaces all instances of $original with $replacement

length($list) Return the length of a list. This can return the number of pairs in a map as

str_slice($string, $start-at, $end-at:-1) Extracts a substring from $string. The substring will begin at index