Bootstrap 4 - Cores
Descrição
Use as classes contextuais para alterar a cor do texto, link (usando classes como texto-primário, texto-secundário etc.) e cor de fundo (usando classes como bg-primário, bg-secundário etc.) de um elemento.
Cor do texto
O exemplo a seguir mostra a mudança de cor do texto usando classes contextuais -
Exemplo
<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>Isso produzirá o seguinte resultado -
Resultado
Cor do link
O exemplo a seguir mostra a mudança de cor do link usando classes contextuais -
Exemplo
<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>Isso produzirá o seguinte resultado -
Resultado
Cor de fundo
O exemplo a seguir mostra a alteração da cor de fundo de um elemento usando classes contextuais -
Exemplo
<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>Isso produzirá o seguinte resultado -