CSS Borders - CSS Tutorial

1. Border Width

The border-width property defines the thickness of the border. You can use pixels or keywords like thin, medium, and thick.

div {
  border-width: 5px;
}

CSS
​x
 
div {  border-width: 5px;}

You can set different widths for each side of the element:

div {
  border-top-width: 5px;
  border-right-width: 10px;
  border-bottom-width: 15px;
  border-left-width: 20px;
}

CSS
 
div {  border-top-width: 5px;  border-right-width: 10px;  border-bottom-width: 15px;  border-left-width: 20px;}

2. Border Style

The border-style property defines the style of the border. Common values include:

solid
dashed
dotted
double
groove

div {
  border-style: solid;
}

CSS
 
div {  border-style: solid;}

3. Border Color

The border-color property defines the color of the border. You can use any CSS color format (name, HEX, RGB, etc.).

div {
  border-color: red;
}

CSS
 
div {  border-color: red;}

Set individual border colors for each side:

div {
  border-top-color: blue;
  border-right-color: green;
}

CSS<br>
 
div {  border-top-color: blue;  border-right-color: green;}

4. Shorthand Border Property

The shorthand border property combines width, style, and color in one line:

div {
  border: 2px solid black;
}

CSS
 
div {  border: 2px solid black;}

CSS Borders Example Code

<!DOCTYPE html>
<html lang="en">
<head>
  <meta charset="UTF-8">
  <meta name="viewport" content="width=device-width, initial-scale=1.0">
  <title>CSS Borders Example</title>
  <style>
    .box {
      border: 3px dashed green;
      padding: 10px;
      width: 200px;
      text-align: center;
    }
  </style>
</head>
<body>

  <div class="box">
    This box has a green dashed border.
  </div>

</body>
</html>

CSS
 
<!DOCTYPE html><html lang="en"><head>  <meta charset="UTF-8">  <meta name="viewport" content="width=device-width, initial-scale=1.0">  <title>CSS Borders Example</title>  <style>    .box {      border: 3px dashed green;      padding: 10px;      width: 200px;      text-align: center;    }  </style></head><body>​  <div class="box">    This box has a green dashed border.  </div>​</body></html>

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