mirror of https://github.com/jkjoy/sunpeiwen.git
69 lines
2.8 KiB
Markdown
69 lines
2.8 KiB
Markdown
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# color-convert
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[](https://travis-ci.org/Qix-/color-convert)
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Color-convert is a color conversion library for JavaScript and node.
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It converts all ways between `rgb`, `hsl`, `hsv`, `hwb`, `cmyk`, `ansi`, `ansi16`, `hex` strings, and CSS `keyword`s (will round to closest):
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```js
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var convert = require('color-convert');
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convert.rgb.hsl(140, 200, 100); // [96, 48, 59]
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convert.keyword.rgb('blue'); // [0, 0, 255]
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var rgbChannels = convert.rgb.channels; // 3
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var cmykChannels = convert.cmyk.channels; // 4
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var ansiChannels = convert.ansi16.channels; // 1
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```
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# Install
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```console
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$ npm install color-convert
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```
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# API
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Simply get the property of the _from_ and _to_ conversion that you're looking for.
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All functions have a rounded and unrounded variant. By default, return values are rounded. To get the unrounded (raw) results, simply tack on `.raw` to the function.
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All 'from' functions have a hidden property called `.channels` that indicates the number of channels the function expects (not including alpha).
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```js
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var convert = require('color-convert');
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// Hex to LAB
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convert.hex.lab('DEADBF'); // [ 76, 21, -2 ]
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convert.hex.lab.raw('DEADBF'); // [ 75.56213190997677, 20.653827952644754, -2.290532499330533 ]
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// RGB to CMYK
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convert.rgb.cmyk(167, 255, 4); // [ 35, 0, 98, 0 ]
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convert.rgb.cmyk.raw(167, 255, 4); // [ 34.509803921568626, 0, 98.43137254901961, 0 ]
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```
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### Arrays
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All functions that accept multiple arguments also support passing an array.
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Note that this does **not** apply to functions that convert from a color that only requires one value (e.g. `keyword`, `ansi256`, `hex`, etc.)
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```js
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var convert = require('color-convert');
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convert.rgb.hex(123, 45, 67); // '7B2D43'
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convert.rgb.hex([123, 45, 67]); // '7B2D43'
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```
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## Routing
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Conversions that don't have an _explicitly_ defined conversion (in [conversions.js](conversions.js)), but can be converted by means of sub-conversions (e.g. XYZ -> **RGB** -> CMYK), are automatically routed together. This allows just about any color model supported by `color-convert` to be converted to any other model, so long as a sub-conversion path exists. This is also true for conversions requiring more than one step in between (e.g. LCH -> **LAB** -> **XYZ** -> **RGB** -> Hex).
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Keep in mind that extensive conversions _may_ result in a loss of precision, and exist only to be complete. For a list of "direct" (single-step) conversions, see [conversions.js](conversions.js).
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# Contribute
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If there is a new model you would like to support, or want to add a direct conversion between two existing models, please send us a pull request.
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# License
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Copyright © 2011-2016, Heather Arthur and Josh Junon. Licensed under the [MIT License](LICENSE).
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