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[<img src="https://github-ads.s3.eu-central-1.amazonaws.com/support-ukraine.svg?t=1" />](https://supportukrainenow.org) # A little library to handle color conversions and comparisons [](https://packagist.org/packages/spatie/color) [](LICENSE.md) [](https://travis-ci.org/spatie/color) [](https://scrutinizer-ci.com/g/spatie/color) [](https://packagist.org/packages/spatie/color)  A little library to handle color conversions and comparisons. Currently supports rgb, rgba, hex, hsl, hsla, CIELab, and xyz color formats as well as CIE76, CIE94, and CIEDE2000 color comparison algorithms. ```php $rgb = Rgb::fromString('rgb(55,155,255)'); echo $rgb->red(); // 55 echo $rgb->green(); // 155 echo $rgb->blue(); // 255 echo $rgb; // rgb(55,155,255) $rgba = $rgb->toRgba(); // `Spatie\Color\Rgba` $rgba->alpha(); // 1 echo $rgba; // rgba(55,155,255,1) $hex = $rgb->toHex(); // `Spatie\Color\Hex` $rgba->alpha(); // ff echo $hex; // #379bff $cmyk = $rgb->toCmyk(); // `Spatie\Color\Cmyk` echo $cmyk; // cmyk(78,39,0,0) $hsl = $rgb->toHsl(); // `Spatie\Color\Hsl` echo $hsl; // hsl(210,100%,100%) $hsb = $rgb->toHsb(); // `Spatie\Color\Hsb` echo $hsb; // hsl(210,78.4%,100%) $lab = $rgb->toCIELab(); echo $lab; // CIELab(62.91,5.34,-57.73) $xyz = $rgb->toXyz(); echo $xyz; // xyz(31.3469,31.4749,99.0308) $hex2 = Hex::fromString('#2d78c8'); $ratio = Contrast::ratio(Hex::fromString('#f0fff0'), Hex::fromString('#191970')); echo $ratio; // 15.0 $cie76_distance = Distance::CIE76($rgb, $hex2); $cie76_distance = Distance::CIE76('rgba(55,155,255,1)', '#2d78c8'); // Outputs the same thing, Factory is built-in to all comparison functions echo $cie76_distance; // 55.89468042667388 $cie94_distance = Distance::CIE94($rgb, $hex2); echo $cie94_distance; // 13.49091942790753 $cie94_textiles_distance = Distance::CIE94($rgb, $hex2, 1); // Third parameter optionally sets the application type (0 = Graphic Arts [Default], 1 = Textiles) echo $cie94_textiles_distance; // 7.0926538068477 $ciede2000_distance = Distance::CIEDE2000($rgb, $hex2); echo $ciede2000_distance; // 12.711957696300898 ``` ## Support us [<img src="https://github-ads.s3.eu-central-1.amazonaws.com/color.jpg?t=1" width="419px" />](https://spatie.be/github-ad-click/color) We invest a lot of resources into creating [best in class open source packages](https://spatie.be/open-source). You can support us by [buying one of our paid products](https://spatie.be/open-source/support-us). We highly appreciate you sending us a postcard from your hometown, mentioning which of our package(s) you are using. You'll find our address on [our contact page](https://spatie.be/about-us). We publish all received postcards on [our virtual postcard wall](https://spatie.be/open-source/postcards). ## Installation You can install the package via composer: ```bash composer require spatie/color ``` ## Usage The `Color` package contains a separate class per color format, which each implement a `Color` interface. There are seven classes which implement the `Color` interface: - `CIELab` - `Cmyk` - `Hex` - `Hsb` - `Hsl` - `Hsla` - `Rgb` - `Rgba` - `Xyz` ### `interface Spatie\Color\Color` #### `fromString(): Color` Parses a color string and returns a `Color` implementation, depending on the format of the input string. ```php Hex::fromString('#000000'); Rgba::fromString('rgba(255, 255, 255, 1)'); Hsla::fromString('hsla(360, 100%, 100%, 1)'); ``` Throws an `InvalidColorValue` exception if the string can't be parsed. > `Rgb`, `Rgba`, `Hsl` and `Hsla` strings are allowed to have spaces. `rgb(0,0,0)` is just as valid as `rgb(0, 0, 0)`. #### `red(): int|string` Return the value of the `red` color channel. ```php Hex::fromString('#ff0000')->red(); // 'ff' Rgb::fromString('rgb(255, 0, 0)')->red(); // 255 ``` #### `green(): int|string` Return the value of the `green` color channel. ```php Hex::fromString('#00ff00')->green(); // 'ff' Rgb::fromString('rgb(0, 255, 0)')->green(); // 255 ``` #### `blue(): int|string` Return the value of the `blue` color channel. ```php Hex::fromString('#0000ff')->blue(); // 'ff' Rgb::fromString('rgb(0, 0, 255)')->blue(); // 255 ``` #### `toCmyk(): Cmyk` Convert a color to a `Cmyk` color. ```php Rgb::fromString('rgb(0, 0, 255)')->toCmyk(); // `Cmyk` instance; 'cmyk(100,100,0,0)' ``` #### `toHex(): Hex` Convert a color to a `Hex` color. ```php Rgb::fromString('rgb(0, 0, 255)')->toHex(); // `Hex` instance; '#0000ff' ``` When coming from a color format that doesn't support opacity, it can be added by passing it to the `$alpha` parameter. #### `toHsb(): Hsb` Convert a color to a `Hsb` color. ```php Rgb::fromString('rgb(0, 0, 255)')->toHsb(); // `Hsl` instance; 'hsb(240, 100%, 100%)' ``` #### `toHsl(): Hsl` Convert a color to a `Hsl` color. ```php Rgb::fromString('rgb(0, 0, 255)')->toHsl(); // `Hsl` instance; 'hsl(240, 100%, 50%)' ``` When coming from a color format that supports opacity, the opacity will simply be omitted. ```php Rgba::fromString('rgba(0, 0, 255, .5)')->toHsl(); // `Hsl` instance; 'hsl(240, 100%, 50%)' ``` #### `toHsla(float $alpha = 1): Hsla` Convert a color to a `Hsla` color. ```php Rgb::fromString('rgb(0, 0, 255)')->toHsla(); // `Hsla` instance; 'hsla(240, 100%, 50%, 1.0)' ``` When coming from a color format that doesn't support opacity, it can be added by passing it to the `$alpha` parameter. ```php Rgb::fromString('rgb(0, 0, 255)')->toHsla(.5); // `Hsla` instance; 'hsla(240, 100%, 50%, 0.5)' ``` #### `toRgb(): Rgb` Convert a color to an `Rgb` color. ```php Hex::fromString('#0000ff')->toRgb(); // `Rgb` instance; 'rgb(0, 0, 255)' ``` When coming from a color format that supports opacity, the opacity will simply be omitted. ```php Rgba::fromString('rgb(0, 0, 255, .5)')->toRgb(); // `Rgb` instance; 'rgb(0, 0, 255)' ``` #### `toRgba(float $alpha = 1): Rgba` Convert a color to a `Rgba` color. ```php Rgb::fromString('rgb(0, 0, 255)')->toRgba(); // `Rgba` instance; 'rgba(0, 0, 255, 1)' ``` When coming from a color format that doesn't support opacity, it can be added by passing it to the `$alpha` parameter. ```php Rgba::fromString('rgb(0, 0, 255)')->toRgba(.5); // `Rgba` instance; 'rgba(0, 0, 255, .5)' ``` #### `__toString(): string` Cast the color to a string. ```php (string) Rgb::fromString('rgb(0, 0, 255)'); // 'rgb(0,0,255)' (string) Rgba::fromString('rgb(0, 0, 255, .5)'); // 'rgb(0,0,255,0.5)' (string) Hex::fromString('#0000ff'); // '#0000ff' (string) Hsla::fromString('hsl(240, 100%, 50%)'); // 'hsl(240, 100%, 50%)' (string) Hsla::fromString('hsla(240, 100%, 50%, 1.0)'); // 'hsla(240, 100%, 50%, 1.0)' ``` ### `Factory::fromString(): Color` With the `Factory` class, you can create a color instance from any string (it does an educated guess under the hood). If the string isn't a valid color string in any format, it throws an `InvalidColorValue` exception. ```php Factory::fromString('rgb(0, 0, 255)'); // `Rgb` instance Factory::fromString('#0000ff'); // `Hex` instance Factory::fromString('hsl(240, 100%, 50%)'); // `Hsl` instance Factory::fromString('Hello world!'); // `InvalidColorValue` exception ``` ## Changelog Please see [CHANGELOG](CHANGELOG.md) for more information what has changed recently. ## Testing ``` bash $ composer test ``` ## Contributing Please see [CONTRIBUTING](https://github.com/spatie/.github/blob/main/CONTRIBUTING.md) for details. ## Security If you've found a bug regarding security please mail [security@spatie.be](mailto:security@spatie.be) instead of using the issue tracker. ## Credits - [Sebastian De Deyne](https://github.com/sebastiandedeyne) - [All Contributors](../../contributors) ## About Spatie Spatie is a webdesign agency based in Antwerp, Belgium. You'll find an overview of all our open source projects [on our website](https://spatie.be/opensource). ## License The MIT License (MIT). Please see [License File](LICENSE.md) for more information.