元素的逻辑块开始边框颜色由 border-block-start-color CSS 属性指定;元素的书写模式、方向性和文本方向决定了实际的物理边框颜色。
根据为元素的书写模式、方向和文本方向提供的值，其行为对应于 border-top-color、border-right-color、border-bottom-color 或 border-left-color。
可能的值
- <color> - 边框的颜色。
语法
border-block-start-color = <color> | <image-1D>
适用于
所有 HTML 元素。
CSS border-block-start-color - 使用十六进制颜色
以下示例演示了 border-block-start-color 属性与十六进制颜色值的用法。
<html>
<head>
<style>
.container {
background-color: #098f07;
width: 350px;
height: 350px;
display: flex;
align-items: center;
justify-content: center;
border-radius: 20px;
}
.demo-border {
writing-mode: horizontal-tb;
border: 8px dashed #111211;
border-block-start-color: #e4f0e4;
padding: 15px;
margin: 10px;
text-align: center;
font-family: 'Arial', sans-serif;
font-size: 20px;
color: #f5f4f0;
}
</style>
</head>
<body>
<div class="container">
<p class="demo-border">A example with border-block-start-color property.</p>
</div>
</body>
</html>
CSS border-block-start-color - 使用 RGB 颜色
以下示例演示了 border-block-start-color 属性与 RGB 颜色值的用法。
<html>
<head>
<style>
.container {
background-color: #098f07;
width: 450px;
height: 350px;
display: flex;
align-items: center;
justify-content: center;
border-radius: 20px;
}
.demo-border {
writing-mode: horizontal-tb;
border: 8px dashed #111211;
border-block-start-color: rgb(10, 150, 250);
padding: 15px;
margin: 15px;
text-align: center;
font-family: 'Arial', sans-serif;
font-size: 25px;
color: #f5f4f0;
}
</style>
</head>
<body>
<div class="container">
<p class="demo-border">An example with border-block-start-color property.</p>
</div>
</body>
</html>
CSS border-block-start-color - 使用 HSL 颜色
以下示例演示了 border-block-start-color 属性与 HSL 颜色值的用法。
<html>
<head>
<style>
.container {
background-color: #098f07;
width: 450px;
height: 350px;
display: flex;
align-items: center;
justify-content: center;
border-radius: 20px;
}
.demo-border {
writing-mode: horizontal-tb;
border: 8px dashed #111211;
border-block-start-color: hsl(120, 70%, 50%);
padding: 15px;
margin: 15px;
text-align: center;
font-family: 'Arial', sans-serif;
font-size: 25px;
color: #f5f4f0;
}
</style>
</head>
<body>
<div class="container">
<p class="demo-border">An example with border-block-start-color property.</p>
</div>
</body>
</html>
CSS border-block-start-color - 使用命名颜色
以下示例演示了 border-block-start-color 属性与命名颜色值的用法。
<html>
<head>
<style>
.container {
background-color: #098f07;
width: 450px;
height: 350px;
display: flex;
align-items: center;
justify-content: center;
border-radius: 20px;
}
.demo-border {
writing-mode: horizontal-tb;
border: 8px dashed #111211;
border-block-start-color: lightgrey;
padding: 15px;
margin: 15px;
text-align: center;
font-family: 'Arial', sans-serif;
font-size: 25px;
color: #f5f4f0;
}
</style>
</head>
<body>
<div class="container">
<p class="demo-border">An example with border-block-start-color property.</p>
</div>
</body>
</html>
CSS border-block-start-color - 使用 RGBA 颜色
以下示例演示了 border-block-start-color 属性在垂直写入模式和 RGBA 颜色值中的用法。
<html>
<head>
<style>
.custom-container {
background-color: #2c3e50;
width: 300px;
height: 400px;
display: flex;
align-items: center;
justify-content: center;
border-radius: 15px;
}
.demo-block {
writing-mode: vertical-rl;
border: 6px double #3498db;
border-block-start-color: rgba(120, 180, 50, 0.8);
padding: 12px;
text-align: center;
font-family: 'Verdana', sans-serif;
font-size: 25px;
color: #ecf0f1;
}
</style>
</head>
<body>
<div class="custom-container">
<p class="demo-block">An example of border-block-start-color property with vertical text.</p>
</div>
</body>
</html>
