# 
> Terminal string styling done right.
[](http://travis-ci.org/sindresorhus/chalk)
[colors.js](https://github.com/Marak/colors.js) is currently the most popular string styling module, but it has serious deficiencies like extending String.prototype which causes all kinds of problems. Although there are other ones, they either do too much or not enough.
**Chalk is a clean and focused alternative.**
## Why
- **Doesn't extend String.prototype**
- Expressive API
- Clean and focused
- Auto-detects color support
- Actively maintained
## Install
Install with [npm](https://npmjs.org/package/chalk): `npm install --save chalk`
## Example
Chalk comes with an easy to use composable API where you just chain the styles you want.
```js
var chalk = require('chalk');
// style a string
console.log(chalk.blue('Hello world!'));
// combine styled and normal strings
console.log(chalk.blue('Hello'), 'World' + chalk.red('!'));
// compose multiple styles using the chainable API
console.log(chalk.blue.bgRed.bold('Hello world!'));
// nest styles
chalk.red('Hello', chalk.underline.bgBlue('world') + '!');
// pass in multiple arguments
console.log(chalk.blue('Hello', 'World!', 'Foo', 'bar', 'biz', 'baz'));
```
You can easily define your own themes.
```js
var chalk = require('chalk');
var error = chalk.bold.red;
console.log(error('Error!'));
```
## API
### chalk.`