sass-site/source/documentation/values.html.md

---
title: Values
introduction: >
  Sass supports a number of value types, most of which come straight from CSS.
  Every [expression](syntax/structure#expressions) produces a value,
  [variables](variables) hold values. Most value types come straight from CSS:
overview: true
---

* [Numbers](values/numbers), which may or may not have units, like `12` or
  `100px`.

* [Strings](values/strings), which may or may not have quotes, like
  `"Helvetica Neue"` or `bold`.

* [Colors](values/colors), which can be referred to by their hex representation
  or by name, like `#c6538c` or `blue`, or returned from functions, like
  `rgb(107, 113, 127)` or `hsl(210, 100%, 20%)`.

* [Lists of values](values/lists), which may be separated by spaces or commas
  and which may be enclosed in square brackets or no brackets at all, like
  `1.5em 1em 0 2em`, `Helvetica, Arial, sans-serif`, or `[col1-start]`.

A few more are specific to Sass:

* The [boolean](values/booleans) values `true` and `false`.

* The singleton [`null`](values/null) value.

* [Maps](values/maps) that associate values with keys, like
  `("background": red, "foreground": pink)`.

* [Function references](values/functions) returned by [`get-function()`][] and
  called with [`call()`][].

[`get-function()`]: modules/meta#get-function
[`call()`]: modules/meta#call