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Color.md

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颜色 Color

// 通过数组与色值下标创建颜色格式
$this->assertEquals('rgb(0,0,1)', ColorHelper::array2value([0, 0, 1], 'rgb'));
$this->assertEquals('rgba(0,0,0,1)', ColorHelper::array2value([0, 0, 0, 1]));
$this->assertEquals('rgba(0,0,0,1)', ColorHelper::array2value(['r' => 0, 'g' => 0, 'b' => 0, 'a' => 1]));
$this->assertEquals('#ff00ff', ColorHelper::array2value([255, 0, 255, 0.5], 'hex'));
$this->assertEquals('cmyk(255,0,255,0.5)', ColorHelper::array2value([255, 0, 255, 0.5], 'cmyk'));
$this->assertEquals('hsl(50,0%,100%)', ColorHelper::array2value([50, 0, 100], 'hsl'));
$this->assertEquals('xyz(50,0,100)', ColorHelper::array2value([50, 0, 100], 'xyz'));
$this->assertEquals('CIELab(50,0,100)', ColorHelper::array2value([50, 0, 100], 'CIELab'));

// 各种颜色格式读取与转换
$color = ColorHelper::convert(ColorHelper::array2value([255, 255, 0, 0.5]));
$this->assertEquals('ff', $color->toHex()->red());
$this->assertEquals('ff', $color->toHex()->green());
$this->assertEquals('00', $color->toHex()->blue());
$this->assertEquals('ff', $color->toHex()->alpha());

// 计算两个之间距离
$this->assertIsFloat(ColorHelper::distance('rgb(0,255,0)', 'rgb(255,0,50)'));
$this->assertIsFloat(ColorHelper::distance('rgb(0,255,0)', 'rgb(255,0,50)', ColorHelper::CIE76));
$this->assertIsFloat(ColorHelper::distance('rgb(0,255,0)', 'rgb(255,0,50)', ColorHelper::CIE94));
$this->assertIsFloat(ColorHelper::distance('rgb(0,255,0)', 'rgb(255,0,50)', ColorHelper::CIE94, false));

// 颜色对比度差异
$color1 = ColorHelper::convert(ColorHelper::array2value([255, 255, 0, 0.5]));
$color2 = ColorHelper::convert(ColorHelper::array2value([255, 0, 0, 0.5]));
$this->assertEquals(3.0, ColorHelper::contrast($color1, $color2));

文档 https://github.com/spatie/color