# PostCSS Gray

[![NPM Version](https://img.shields.io/npm/v/postcss-color-gray.svg)](https://www.npmjs.com/package/postcss-color-gray) [![CSS Standard Status](https://cssdb.org/badge/gray-function.svg)](https://cssdb.org/#gray-function) [![Build Status](https://img.shields.io/travis/postcss/postcss-color-gray.svg)](https://travis-ci.org/postcss/postcss-color-gray) [![Support Chat](https://img.shields.io/badge/support-chat-blue.svg)](https://gitter.im/postcss/postcss)

[PostCSS Gray](https://github.com/postcss/postcss-color-gray) lets you use the `gray()` color function in CSS, following the [CSSWG Specification](https://drafts.csswg.org/css-color/#grays).

```
body {
  background-color: gray(100);
  color: gray(0 / 90%);
}

/* becomes */

body {
  background-color: rgb(255,255,255);
  color: rgba(0,0,0,.9);
}
```

## Usage

Add [PostCSS Gray](https://github.com/postcss/postcss-color-gray) to your project:

```bash
npm install postcss-color-gray --save-dev
```

Use [PostCSS Gray](https://github.com/postcss/postcss-color-gray) to process your CSS:

```js
import postcssGray from 'postcss-color-gray';

postcssGray.process(YOUR_CSS /*, processOptions, pluginOptions */);
```

Or use it as a [PostCSS](https://github.com/postcss/postcss) plugin:

```js
import postcss from 'postcss';
import postcssGray from 'postcss-color-gray';

postcss([
  postcssGray(/* pluginOptions */)
]).process(YOUR_CSS /*, processOptions */);
```

[PostCSS Gray](https://github.com/postcss/postcss-color-gray) runs in all Node environments, with special instructions for:

| [Node](https://github.com/bgoonz/Learning-Redux/blob/master/repos/examples/real-world/node_modules/postcss-color-gray/INSTALL.md#node) | [Webpack](https://github.com/bgoonz/Learning-Redux/blob/master/repos/examples/real-world/node_modules/postcss-color-gray/INSTALL.md#webpack) | [Create React App](https://github.com/bgoonz/Learning-Redux/blob/master/repos/examples/real-world/node_modules/postcss-color-gray/INSTALL.md#create-react-app) | [Gulp](https://github.com/bgoonz/Learning-Redux/blob/master/repos/examples/real-world/node_modules/postcss-color-gray/INSTALL.md#gulp) | [Grunt](https://github.com/bgoonz/Learning-Redux/blob/master/repos/examples/real-world/node_modules/postcss-color-gray/INSTALL.md#grunt) |
| -------------------------------------------------------------------------------------------------------------------------------------- | -------------------------------------------------------------------------------------------------------------------------------------------- | -------------------------------------------------------------------------------------------------------------------------------------------------------------- | -------------------------------------------------------------------------------------------------------------------------------------- | ---------------------------------------------------------------------------------------------------------------------------------------- |

## Options

### preserve

The `preserve` option determines whether the original `gray()` function should be preserved or replaced. By default, the `gray()` function is replaced.

By setting `preserve` to `true`, the original `gray()` function is preserved.

```js
postcssGray({ preserve: true });
```

```
body {
  background-color: gray(100);
  color: gray(0 / 90%);
}

/* becomes */

body {
  background-color: gray(100);
  background-color: rgb(255,255,255);
  color: gray(0 / 90%);
  color: rgba(0,0,0,.9);
}
```


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