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css3 supports rgba; the rgba() function is a function in css3 that uses the superposition of red, green, blue, and transparency to generate a variety of colors. The value range of red, green, and blue is "0 to 255" or "0% to 100%", and the value range of transparency is 0 to 1, and the syntax is "rgba (red, green, blue, transparency)".
The operating environment of this tutorial: Windows 10 system, CSS3&&HTML5 version, Dell G3 computer.
The rgba() function uses the superposition of red (R), green (G), blue (B), and transparency (A) to generate a variety of colors . Supported version: CSS3
RGBA means red, green, blue, transparency (English: Red, Green, Blue, Alpha).
Colors in CSS are defined in three ways: using color methods (RGB, RGBA, HSL, HSLA), hexadecimal color values and predefined color names.
CSS Syntax
rgba(red, green, blue, alpha)
red defines the red value, the value range is 0 ~ 255, you can also use the percentage 0% ~ 100%.
green defines the green value, the value range is 0 ~ 255, you can also use the percentage 0% ~ 100%.
blue defines the blue value, the value range is 0 ~ 255, you can also use the percentage 0% ~ 100%.
alpha - Transparency Define transparency 0 (completely transparent) ~ 1 (completely opaque)
The example is as follows:
<html>
<head>
<meta charset="utf-8">
<title>123</title>
<style>
#p1 {background-color:rgba(255,0,0,0.3);}
#p2 {background-color:rgba(0,255,0,0.3);}
#p3 {background-color:rgba(0,0,255,0.3);}
#p4 {background-color:rgba(192,192,192,0.3);}
#p5 {background-color:rgba(255,255,0,0.3);}
#p6 {background-color:rgba(255,0,255,0.3);}
</style>
</head>
<body>
<p>RGB 颜色，并使用透明度:</p>
<p id="p1">红色</p>
<p id="p2">绿色</p>
<p id="p3">蓝色</p>
<p id="p4">灰色</p>
<p id="p5">黄色</p>
<p id="p6">樱桃色</p>
</body>
</html>Output result:
(Learning video sharing: css video tutorial)
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