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Html 向图像添加黑色透明度_Html_Css_Frontend - Fatal编程技术网

Html 向图像添加黑色透明度

Html 向图像添加黑色透明度,html,css,frontend,Html,Css,Frontend,这是我的网页的外观: 我使用以下图像作为背景: 如何在图像上设置黑色透明覆盖,因此它看起来如下所示: 以下是我的html和CSS代码: <!DOCTYPE html> <html> <head> <title>Background Image</title> <meta charset="utf-8"></meta> <meta na

这是我的网页的外观:

我使用以下图像作为背景:

如何在图像上设置黑色透明覆盖,因此它看起来如下所示:

以下是我的html和CSS代码:

<!DOCTYPE html>
<html>
   <head>
       <title>Background Image</title>
       <meta charset="utf-8"></meta>
       <meta name="viewport" content="width=device-width, initial-scale=1" ></meta>
       <link rel="stylesheet" href="https://maxcdn.bootstrapcdn.com/bootstrap/4.5.2/css/bootstrap.min.css" />
       <script src="https://maxcdn.bootstrapcdn.com/bootstrap/4.5.2/js/bootstrap.min.js"></script>
   </head>

   <style type="text/css">
    body{
    margin-top: 53px;
    }

    .jumbotron {
    background-image: url("background1.jpg");
    text-align: center;
    height:522px;
    background-size: cover;
    }

   </style>

   <body>                 
    <section id="page-top">
            <div class="jumbotron">
              <p data-aos="zoom-out" data-aos-delay="500" style="font: 120px Verdana,sans-serif; margin-top: 35px; color: black; animation-duration: 2s; animation-iteration-count:infinite; animation-delay: 1s;" class="lead pulse mb-5 green pb-5 aos-init aos-animate">Matt Williams</p>
              <p data-aos="zoom-out" data-aos-delay="500" style="font: 20px Georgia,serif;font-style:italic; line-height: 1.6; color:white;animation-duration:2s;animation-iteration-count:infinite; animation-delay:1s;" class="lead pulse mb-5 lightGreen pb-5 aos-init aos-animate d-none d-lg-block">Lorem Ipsum.<br>Lorem Ipsum.</p>
            </div>
        </section>
   </body>
</html>

背景图像
身体{
边缘顶端:53px;
}
琼伯伦先生{
背景图片:url(“background1.jpg”);
文本对齐:居中;
高度:522px;
背景尺寸:封面;
}

Matt Williams

Lorem Ipsum。
Lorem Ipsum


您可以在url背景之前添加透明渐变:

.jumbotron{
背景图像:线性渐变(0deg,rgba(0,0,0,0.5),rgba(0,0,0,0.5)),url(“background1.jpg”);
}
例如:

正文{
背景图像:线性渐变(0度,rgba(0,0,0,0.5),rgba(0,0,0,0.5)),url(https://picsum.photos/id/896/640/480);

}
您可以在url背景之前添加透明渐变:

.jumbotron{
背景图像:线性渐变(0deg,rgba(0,0,0,0.5),rgba(0,0,0,0.5)),url(“background1.jpg”);
}
例如:

正文{
背景图像:线性渐变(0度,rgba(0,0,0,0.5),rgba(0,0,0,0.5)),url(https://picsum.photos/id/896/640/480);
}