mirror of
https://github.com/thangisme/notes.git
synced 2024-11-01 01:37:37 -04:00
125 lines
4.0 KiB
Markdown
125 lines
4.0 KiB
Markdown
|
[](https://travis-ci.org/SlexAxton/css-colorguard)
|
||
|
|
|
||
|
|
# CSS Colorguard
|
||
|
|
|
||
|
|
Every CSS project starts out with good intentions, but inevitably, one too many people eye-dropper
|
||
|
|
colors into nooks and crannies that you never knew existed. CSS Colorguard helps you maintain the
|
||
|
|
color set that you want, and warns you when colors you've added are too similar to ones that already
|
||
|
|
exist. Naturally, it's all configurable to your tastes.
|
||
|
|
|
||
|
|
## How it works
|
||
|
|
|
||
|
|
Colorguard uses the [CIEDE2000](http://en.wikipedia.org/wiki/Color_difference#CIEDE2000) algorithm to determine
|
||
|
|
the similarity of each of the colors in your CSS file. This algorithm is quite complex, but is used
|
||
|
|
in the broadcasting community as the best approximation of human ability to discern differences in
|
||
|
|
color. RGB on the other hand, is pretty bad at representing differences in color purely based on the
|
||
|
|
numerical difference of the hex values.
|
||
|
|
|
||
|
|
Luckily, [someone else already implemented CIEDE2000](https://github.com/markusn/color-diff), so I
|
||
|
|
didn't have to. Tight. Cause this thing is mathy as hell.
|
||
|
|
|
||
|
|
|
||
|
|
|
||
|
|
### Alpha Transparency
|
||
|
|
|
||
|
|
Currently, alpha transparency is just stripped from the colors. So `rgb(0, 0, 0)` exactly matches
|
||
|
|
`rgba(0,0,0,0.5)`. This is usually fine unless someone is alphatransparency-happy and uses it for
|
||
|
|
darkening and lightening colors too often. It could probably be its own check in the future that
|
||
|
|
there aren't too many different alpha transparencies of the same color. This is not currently a
|
||
|
|
thing though.
|
||
|
|
|
||
|
|
## API
|
||
|
|
|
||
|
|
### `colorguard.process(css, [options]).then(function(result) {})`
|
||
|
|
|
||
|
|
#### options
|
||
|
|
|
||
|
|
##### ignore
|
||
|
|
|
||
|
|
Type: `array`
|
||
|
|
|
||
|
|
Specify hex codes of colors that you would like to ignore completely.
|
||
|
|
Use with caution.
|
||
|
|
|
||
|
|
##### threshold
|
||
|
|
|
||
|
|
Type: `number`
|
||
|
|
Default: `3`
|
||
|
|
|
||
|
|
`0` through `100`. Lower values are more precise; the default is `3` but that's
|
||
|
|
mostly personal opinion.
|
||
|
|
|
||
|
|
##### whitelist
|
||
|
|
|
||
|
|
Type: `array`
|
||
|
|
|
||
|
|
Pass an array of color pairs to ignore:
|
||
|
|
|
||
|
|
```js
|
||
|
|
[['#000000', '#010101']]
|
||
|
|
```
|
||
|
|
|
||
|
|
##### allowEquivalentNotation
|
||
|
|
|
||
|
|
Type: `boolean`
|
||
|
|
Default: `false`
|
||
|
|
|
||
|
|
By default, colorguard will complain if identical colors are represented with different notations.
|
||
|
|
For example, `#000`, `#000000`, `rgba(0, 0, 0, 0), and `black`. If you want to permit these
|
||
|
|
equivalent notations, set this option to `true`.
|
||
|
|
|
||
|
|
### `postcss([ colorguard(opts) ])`
|
||
|
|
|
||
|
|
CSS Colorguard can be consumed as a PostCSS plugin. See the
|
||
|
|
[documentation](https://github.com/postcss/postcss#usage) for examples for
|
||
|
|
your environment.
|
||
|
|
|
||
|
|
### Build Time
|
||
|
|
|
||
|
|
CSS Colorguard can be used in conjunction with other javascript build systems, such as:
|
||
|
|
|
||
|
|
* [gulp-colorguard](https://github.com/pgilad/gulp-colorguard)
|
||
|
|
* [broccoli-colorguard](https://github.com/SlexAxton/broccoli-colorguard)
|
||
|
|
* [grunt-colorguard](https://github.com/elliottwilliams/grunt-colorguard)
|
||
|
|
|
||
|
|
### CLI
|
||
|
|
|
||
|
|
CSS Colorguard also ships with a CLI app. To see the available options, just run:
|
||
|
|
|
||
|
|
```bash
|
||
|
|
$ colorguard --help
|
||
|
|
```
|
||
|
|
|
||
|
|
## Install
|
||
|
|
|
||
|
|
With npm, to get the command do:
|
||
|
|
|
||
|
|
```bash
|
||
|
|
npm install -g colorguard
|
||
|
|
```
|
||
|
|
|
||
|
|
To get the library & PostCSS plugin, do:
|
||
|
|
|
||
|
|
```bash
|
||
|
|
npm install colorguard
|
||
|
|
```
|
||
|
|
|
||
|
|
## Thanks
|
||
|
|
|
||
|
|
* [Stripe](https://stripe.com/) - They let me build this at work
|
||
|
|
* [@markusn](https://github.com/markusn) - Best CIEDE2000 implementation ever
|
||
|
|
|
||
|
|
## License
|
||
|
|
|
||
|
|
Licensed under the Apache License, Version 2.0 (the "License");
|
||
|
|
you may not use this file except in compliance with the License.
|
||
|
|
You may obtain a copy of the License at
|
||
|
|
|
||
|
|
[http://www.apache.org/licenses/LICENSE-2.0](http://www.apache.org/licenses/LICENSE-2.0)
|
||
|
|
|
||
|
|
Unless required by applicable law or agreed to in writing, software
|
||
|
|
distributed under the License is distributed on an "AS IS" BASIS,
|
||
|
|
WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
|
||
|
|
See the License for the specific language governing permissions and
|
||
|
|
limitations under the License.
|