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How do I give text or an image a transparent background using CSS?（29个答案）
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HTML当我运行这段代码时，它向我显示了背景和文本透明度降低
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<meta http-equiv="X-UA-Compatible" content="IE=edge">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<title>Document</title>
<style>
#h1{
background-color: rgb(81, 5, 151);
opacity: 0.8;
}
</style>
</head>
<body>
<h1 id="h1">Change only background opacity not text. When I am run this code it has shown me both opacity decrease background and text.<y /h1> Here I have taken h1 and give id
</body>
</html>
1条答案
按热度按时间6psbrbz91#
通过减小此值（如0.7或0.5）将帮助您更改背景图像的透明度或不透明度