# PostCSS Color Hex Alpha [
][postcss]
[
][npm-url] [
][css-url] [
][cli-url] [
][discord]
[PostCSS Color Hex Alpha] lets you use 4 & 8 character hex color notation in
CSS, following the [CSS Color Module] specification.
```pcss
body {
background: #9d9c;
}
/* becomes */
body {
background: rgba(153,221,153,0.8);
}
```
## Usage
Add [PostCSS Color Hex Alpha] to your project:
```bash
npm install postcss postcss-color-hex-alpha --save-dev
```
Use it as a [PostCSS] plugin:
```js
const postcss = require('postcss');
const postcssColorHexAlpha = require('postcss-color-hex-alpha');
postcss([
postcssColorHexAlpha(/* pluginOptions */)
]).process(YOUR_CSS /*, processOptions */);
```
[PostCSS Color Hex Alpha] runs in all Node environments, with special
instructions for:
| [Node](INSTALL.md#node) | [PostCSS CLI](INSTALL.md#postcss-cli) | [Webpack](INSTALL.md#webpack) | [Create React App](INSTALL.md#create-react-app) | [Gulp](INSTALL.md#gulp) | [Grunt](INSTALL.md#grunt) |
| --- | --- | --- | --- | --- | --- |
## Options
### preserve
The `preserve` option determines whether the original notation
is preserved. By default, it is not preserved.
```js
postcssColorHexAlpha({ preserve: true })
```
```pcss
body {
background: #9d9c;
}
/* becomes */
body {
background: rgba(153,221,153,0.8);
background: #9d9c;
}
```
[cli-url]: https://github.com/csstools/postcss-plugins/actions/workflows/test.yml?query=workflow/test
[css-url]: https://cssdb.org/#hexadecimal-alpha-notation
[discord]: https://discord.gg/bUadyRwkJS
[npm-url]: https://www.npmjs.com/package/postcss-color-hex-alpha
[Gulp PostCSS]: https://github.com/postcss/gulp-postcss
[Grunt PostCSS]: https://github.com/nDmitry/grunt-postcss
[PostCSS]: https://github.com/postcss/postcss
[PostCSS Loader]: https://github.com/postcss/postcss-loader
[PostCSS Color Hex Alpha]: https://github.com/csstools/postcss-plugins/tree/main/plugins/postcss-color-hex-alpha
[CSS Color Module]: https://www.w3.org/TR/css-color-4/#hex-notation