有人能指出为什么我的图像不会变暗吗?我正在教自己一些HTML和CSS,不能让这个图像变得更暗。
.carousel-content {
min-height: 100%;
background-position: center;
background-size: cover;
position: fixed;
top: 0;
left: 0;
background: rgba(0, 0, 0, 0.5);
}
.image1 {
width: 100%;
background: rgba(0, 0, 0, 0.5);
}

<div class="carousel-content">
<img class="image1" src="https://cloud.netlifyusercontent.com/assets/344dbf88-fdf9-42bb-adb4-46f01eedd629/68dd54ca-60cf-4ef7-898b-26d7cbe48ec7/10-dithering-opt.jpg" />
</div>
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答案 0 :(得分:3)
背景在图像后面,如果你想让它变暗,你需要在它上面加一个覆盖层,并在那里设置透明背景。
.carousel-content {
position: relative;
}
.overlay {
position: absolute;
left: 0;
top: 0;
height: 150px;
width: 275px;
background: rgba(0,0,0,0.5);
border-right: 2px dashed #fff;
}
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<div class="carousel-content">
<img class="image1" src="http://via.placeholder.com/350x150/ff0000/ffffff" />
<div class="overlay"></div>
</div>
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或者您可以在现代浏览器中使用css过滤器:
img {
filter: brightness(50%);
}
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<img src="http://via.placeholder.com/350x150" />
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答案 1 :(得分:0)
您也可以按照它的方式保持它(假设是黑色背景),只需将图像的不透明度设置为稍微淡化并显示纯色背景。
.carousel-content {
min-height: 100%;
background-position: center;
background-size: cover;
position: fixed;
top: 0;
left: 0;
background: rgba(0, 0, 0, 1);
}
.image1 {
width: 100%;
opacity: .5;
}
<div class="carousel-content">
<img class="image1" src="https://cloud.netlifyusercontent.com/assets/344dbf88-fdf9-42bb-adb4-46f01eedd629/68dd54ca-60cf-4ef7-898b-26d7cbe48ec7/10-dithering-opt.jpg" />
</div>