Bootstrap 4 - 顏色

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描述

使用上下文類來更改元素的文字顏色、連結顏色（使用類似於 text-primary、text-secondary 等類）和背景顏色（使用類似於 bg-primary、bg-secondary 等類）。

文字顏色

以下示例展示瞭如何使用上下文類更改文字顏色 -

示例

即時演示 
<html lang = "en">
   <head>
      <!-- Meta tags -->
      <meta charset = "utf-8">
      <meta name = "viewport" content = "width = device-width, initial-scale = 1, shrink-to-fit = no">
      
      <!-- Bootstrap CSS -->
      <link rel = "stylesheet" 
         href = "https://maxcdn.bootstrapcdn.com/bootstrap/4.1.3/css/bootstrap.min.css">
      <script src = "https://ajax.googleapis.com/ajax/libs/jquery/3.3.1/jquery.min.js"></script>
      <title>Bootstrap 4 Example</title>
   </head>
   
   <body>
      <div class = "container-fluid">
         <h2>Text Color</h2>
         <p class = "text-primary">Color : text-primary </p>
         <p class = "text-secondary">Color : text-secondary</p>
         <p class = "text-success">Color : text-success</p>
         <p class = "text-danger">Color : text-danger</p>
         <p class = "text-warning">Color : text-warning</p>
         <p class = "text-info">Color : text-info</p>
         <p class = "text-black-50">Color : text-black-50</p>
         <p class = "text-dark">Color : text-dark</p>
         <p class = "text-body">Color : text-body</p>
         <p class = "text-muted">Color : text-muted</p>
         <p class = "text-white bg-dark">Color : text-white</p>
         <p class = "text-light bg-dark">Color : text-light</p>
         <p class = "text-white-50 bg-dark">Color : text-white-50</p>
      </div>
      
      <!-- jQuery first, then Popper.js, then Bootstrap JS -->
      <script src = "https://code.jquery.com/jquery-3.2.1.slim.min.js" 
         integrity = "sha384-KJ3o2DKtIkvYIK3UENzmM7KCkRr/rE9/Qpg6aAZGJwFDMVNA/GpGFF93hXpG5KkN" 
         crossorigin = "anonymous">
      </script>
      
      <!-- Popper -->
      <script src = "https://cdnjs.cloudflare.com/ajax/libs/popper.js/1.12.9/umd/popper.min.js" 
         integrity = "sha384-ApNbgh9B+Y1QKtv3Rn7W3mgPxhU9K/ScQsAP7hUibX39j7fakFPskvXusvfa0b4Q" 
         crossorigin = "anonymous">
      </script>
      
      <!-- Latest compiled and minified Bootstrap JavaScript -->
      <script src = "https://maxcdn.bootstrapcdn.com/bootstrap/4.0.0/js/bootstrap.min.js" 
         integrity = "sha384-JZR6Spejh4U02d8jOt6vLEHfe/JQGiRRSQQxSfFWpi1MquVdAyjUar5+76PVCmYl" 
         crossorigin = "anonymous">
      </script>
      
   </body>
</html>

將產生以下結果 -

輸出

連結顏色

以下示例展示瞭如何使用上下文類更改連結顏色 -

示例

即時演示 
<html lang = "en">
   <head>
      <!-- Meta tags -->
      <meta charset = "utf-8">
      <meta name = "viewport" content = "width = device-width, initial-scale = 1, shrink-to-fit = no">
      
      <!-- Bootstrap CSS -->
      <link rel = "stylesheet" 
         href = "https://maxcdn.bootstrapcdn.com/bootstrap/4.1.3/css/bootstrap.min.css">
      <script src = "https://ajax.googleapis.com/ajax/libs/jquery/3.3.1/jquery.min.js"></script>
      <title>Bootstrap 4 Example</title>
   </head>
   
   <body>
      <div class = "container-fluid">
         <h2>Link Color</h2>
         <p><a href = "#" class = "text-primary">Primary link</a></p>
         <p><a href = "#" class = "text-secondary">Secondary link</a></p>
         <p><a href = "#" class = "text-success">Success link</a></p>
         <p><a href = "#" class = "text-danger">Danger link</a></p>
         <p><a href = "#" class = "text-warning">Warning link</a></p>
         <p><a href = "#" class = "text-info">Info link</a></p>
         <p><a href = "#" class = "text-dark">Dark link</a></p>
         <p><a href = "#" class = "text-muted">Muted link</a></p>
         <p><a href = "#" class = "text-light bg-dark">Light link</a></p>
         <p><a href = "#" class = "text-white bg-dark">White link</a></p>
      </div>
      
      <!-- jQuery first, then Popper.js, then Bootstrap JS -->
      <script src = "https://code.jquery.com/jquery-3.2.1.slim.min.js" 
         integrity = "sha384-KJ3o2DKtIkvYIK3UENzmM7KCkRr/rE9/Qpg6aAZGJwFDMVNA/GpGFF93hXpG5KkN" 
         crossorigin = "anonymous">
      </script>
      
      <!-- Popper -->
      <script src = "https://cdnjs.cloudflare.com/ajax/libs/popper.js/1.12.9/umd/popper.min.js" 
         integrity = "sha384-ApNbgh9B+Y1QKtv3Rn7W3mgPxhU9K/ScQsAP7hUibX39j7fakFPskvXusvfa0b4Q" 
         crossorigin = "anonymous">
      </script>
      
      <!-- Latest compiled and minified Bootstrap JavaScript -->
      <script src = "https://maxcdn.bootstrapcdn.com/bootstrap/4.0.0/js/bootstrap.min.js" 
         integrity = "sha384-JZR6Spejh4U02d8jOt6vLEHfe/JQGiRRSQQxSfFWpi1MquVdAyjUar5+76PVCmYl" 
         crossorigin = "anonymous">
      </script>
      
   </body>
</html>

將產生以下結果 -

輸出

背景顏色

以下示例展示瞭如何使用上下文類更改元素的背景顏色 -

示例

即時演示 
<html lang = "en">
   <head>
      <!-- Meta tags -->
      <meta charset = "utf-8">
      <meta name = "viewport" content = "width = device-width, initial-scale = 1, shrink-to-fit = no">
      
      <!-- Bootstrap CSS -->
      <link rel = "stylesheet" 
         href = "https://maxcdn.bootstrapcdn.com/bootstrap/4.1.3/css/bootstrap.min.css">
      <script src = "https://ajax.googleapis.com/ajax/libs/jquery/3.3.1/jquery.min.js"></script>
      <title>Bootstrap 4 Example</title>
   </head>
   
   <body>
      <div class = "container-fluid">
         <h2>Background Color</h2>
         <div class = "p-3 mb-2 bg-primary text-white">class = 'bg-primary'</div>
         <div class = "p-3 mb-2 bg-secondary text-white">class = 'bg-secondary'</div>
         <div class = "p-3 mb-2 bg-success text-white">class = 'bg-success'</div>
         <div class = "p-3 mb-2 bg-danger text-white">class = 'bg-danger'</div>
         <div class = "p-3 mb-2 bg-warning text-dark">class = 'bg-warning'</div>
         <div class = "p-3 mb-2 bg-info text-white">class = 'bg-info'</div>
         <div class = "p-3 mb-2 bg-light text-dark">class = 'bg-light'</div>
         <div class = "p-3 mb-2 bg-dark text-white">class = 'bg-dark'</div>
         <div class = "p-3 mb-2 bg-white text-dark">class = 'bg-white'</div>
         <div class = "p-3 mb-2 bg-transparent text-dark">class = 'bg-transparent'</div>
      </div>
      
      <!-- jQuery first, then Popper.js, then Bootstrap JS -->
      <script src = "https://code.jquery.com/jquery-3.2.1.slim.min.js" 
         integrity = "sha384-KJ3o2DKtIkvYIK3UENzmM7KCkRr/rE9/Qpg6aAZGJwFDMVNA/GpGFF93hXpG5KkN" 
         crossorigin = "anonymous">
      </script>
      
      <!-- Popper -->
      <script src = "https://cdnjs.cloudflare.com/ajax/libs/popper.js/1.12.9/umd/popper.min.js" 
         integrity = "sha384-ApNbgh9B+Y1QKtv3Rn7W3mgPxhU9K/ScQsAP7hUibX39j7fakFPskvXusvfa0b4Q" 
         crossorigin = "anonymous">
      </script>
      
      <!-- Latest compiled and minified Bootstrap JavaScript -->
      <script src = "https://maxcdn.bootstrapcdn.com/bootstrap/4.0.0/js/bootstrap.min.js" 
         integrity = "sha384-JZR6Spejh4U02d8jOt6vLEHfe/JQGiRRSQQxSfFWpi1MquVdAyjUar5+76PVCmYl" 
         crossorigin = "anonymous">
      </script>
      
   </body>
</html>

將產生以下結果 -

輸出

bootstrap4_utilities.htm
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