1.颜色小tip知识
在背景色上方叠加一个黑色半透明层 rgba(0,0,0,.2) 可以得到一个更暗的颜色
在背景色上方叠加一个白色半透明层 rgba(255,255,255,.2) 可以得到一个更亮的颜色
单个颜色实现 hover 和 active 时的明暗变化效果
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title>单个颜色实现 hover 和 active 时的明暗变化效果</title>
<style type="text/css">
a {
text-decoration: none;
}
.rubby {
position: absolute;
left: 50%;
top: 50%;
transform: translate(-50%,-50%); /*触发层叠上下文*/
width: 260px;
text-align: center;
padding: 40px;
font-size: 200%;
font-weight: bolder;
background-color: #00aabb;
color: #fff;
cursor: pointer;
border-radius: 1em;
} .rubby:before {
position: absolute;
left: 0;
top: 0;
right: 0;
bottom: 0;
border-radius: 1em;
background-color: rgba(255,255,255,.2);
z-index: -1;
}
.rubby:hover:before {
content: "";
}
.rubby:after {
position: absolute;
left: 0;
top: 0;
right: 0;
bottom: 0;
background-color: rgba(0,0,0,.3);
border-radius: 1em;
z-index: -1;
}
.rubby:active:after {
content: "";
} </style>
</head>
<body>
<a href="#none" class="rubby">.Rubby</a>
</body>
</html>
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