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如何改變引導(dǎo)下拉背景顏色和？CSS中的顏色？

CSS

我一直在嘗試一切改變背景顏色& amp沒(méi)有成功的下拉菜單的顏色。下拉項(xiàng)目)。現(xiàn)在下拉菜單的背景顏色是非常淺的灰色，每個(gè)項(xiàng)目上的懸停有一個(gè)中等淺灰色的背景和一個(gè)黃色的顏色，這不是非常對(duì)比，我需要改變它們。

/* navbar */

.navbar-nav {
  font-weight: bold !important;
}


/* navbar bgn color */

.nav-item a,
.nav-item a:link,
.nav-item a:visited {
  color: var(--bodyPage) !important;
}


/* navbar item font color */

.nav-item a:hover,
.nav-item a:focus {
  color: var(--linkHover) !important;
}


/* navbar item hover font color */

.active a,
.nav-item .active a:link,
.active a:visited {
  color: var(--navActive) !important;
}


/* active navbar item font color */

.active a:hover,
.active a:focus {
  color: var(--linkHover) !important;
}


/* active navbar item hover font color */


/* links */

a,
a:link,
a:visited {
  color: var(--link);
}

a:hover,
a:focus {
  color: var(--linkHover);
}

.site-footer a,
.site-footer a:link,
.site-footer a:visited {
  color: var(--link);
}


/* footer link color */

.site-footer a:hover,
.site-footer a:focus {
  color: var(--linkHover);
}


/* footer hover link color */

.site-page a,
.site-page a:link,
.site-page a:visited {
  color: var(--link);
}


/* page body link color */

.site-page a:hover,
.site-page a:focus {
  color: var(--linkHover);
}


/* page body hover link color */

.banner a,
.banner a:link,
.banner a:visited {
  color: var(--link);
}


/* banner link color */

.banner a:hover,
.banner a:focus {
  color: var(--linkHover);
}


/* banner hover link color */

.no-banner a,
.no-banner a:link,
.no-banner a:visited {
  color: var(--link);
}


/* no banner link color */

.no-banner a:hover,
.no-banner a:focus {
  color: var(--linkHover);
}


/* no banner hover link color */

.navbar-default .navbar-toggle {
  background-color: red !important;
}

@media (max-width:992px) {
  .navbar-nav {
    background-color: black !important;
    padding: 8px !important;
  }
}


/* dropdown menu */

.dropdown-menu {
  background-color: rgb(99, 97, 97) !important;
}

.dropdown-item a:hover {
  background-color: rgb(0, 0, 0) !important;
}

<link rel="stylesheet"  integrity="sha384-Gn5384xqQ1aoWXA+058RXPxPg6fy4IWvTNh0E263XmFcJlSAwiGgFAW/dAiS6JXm" crossorigin="anonymous">
<script src="https://code.jquery.com/jquery-3.2.1.slim.min.js" integrity="sha384-KJ3o2DKtIkvYIK3UENzmM7KCkRr/rE9/Qpg6aAZGJwFDMVNA/GpGFF93hXpG5KkN" crossorigin="anonymous"></script>
<script src="https://cdn.jsdelivr.net/npm/popper.js@1.12.9/dist/umd/popper.min.js" integrity="sha384-ApNbgh9B+Y1QKtv3Rn7W3mgPxhU9K/ScQsAP7hUibX39j7fakFPskvXusvfa0b4Q" crossorigin="anonymous"></script>
<script src="https://cdn.jsdelivr.net/npm/bootstrap@4.0.0/dist/js/bootstrap.min.js" integrity="sha384-JZR6Spejh4U02d8jOt6vLEHfe/JQGiRRSQQxSfFWpi1MquVdAyjUar5+76PVCmYl" crossorigin="anonymous"></script>

<body data-spy="scroll" data-target=".site-navbar-target" data-offset="300">
  <div class="site-wrap" id="home-section">
    <header class="container-fluid sticky site-header" id="headerSite">
      <div class="container">
        <nav class="navbar navbar-expand-md navbar-light">
          <div class="collapse navbar-collapse justify-content-between" id="navbarCollapse">
            <div class="navbar-nav mr-auto">
              <li class="nav-item"><a href="/dashboard" class="nav-link">Dashboard</a></li>
              <div class="nav-item dropdown">
                <a href="#" class="nav-link dropdown-toggle" id="dropdownNav" data-bs-toggle="dropdown">database</a>
                <div class="dropdown-menu" aria-labelledby="dropdownNav">
                  <a href="..." class="dropdown-item">table1</a>
                  <a href="..." class="dropdown-item">table2</a>
                  <a href="..." class="dropdown-item">table3</a>
                </div>
              </div>
            </div>
          </div>
        </nav>
      </div>
    </header>

添加自定義css文件(例如style.css)并在您的引導(dǎo)css引用下添加對(duì)它的引用(例如& ltlink rel = & quot樣式表& quothref = & quot指向您的css文件/style . CSS & quot；& gt)

向您想要修改的元素添加一個(gè)新的自定義類，并根據(jù)您的要求對(duì)該類進(jìn)行著色。

例如& lta href = & quot# & quotclass = & quot導(dǎo)航鏈接下拉菜單-切換自定義下拉菜單id = & quotdropdownNav & quotdata-bs-toggle = & quot；下拉菜單& quot& gt數(shù)據(jù)庫(kù)& lt/a & gt；

您也可以對(duì)下拉項(xiàng)目進(jìn)行同樣的操作。 這是你的解決方案... 現(xiàn)在它成功地改變了 請(qǐng)解釋我對(duì)代碼檢查的意見(jiàn) 在你的css文件或者樣式標(biāo)簽中使用這段代碼，那么下拉列表將會(huì)改變...

.dropdown {
            background-color: aqua !important;
            /* this is for dropdown background */
        }

        .dropdown a {
            color: whitesmoke !important;
            /* this is for dropdown text color */
        }

        .dropdown-menu {
            background-color: brown !important;
/* this is for dropdown menu background */
        }

        a.dropdown-item {
            color: blueviolet !important;
/* this is for dropdown menu text color */
        }

        a.dropdown-item:hover {
            background-color: chocolate;
            color: seagreen !important;
/* this is for dropdown menu hover background and text color */
        }

<script src="https://cdn.jsdelivr.net/npm/bootstrap@5.3.0-alpha3/dist/js/bootstrap.bundle.min.js"></script>
<link  rel="stylesheet"/>



    <nav class="navbar navbar-expand-lg bg-body-tertiary">
        <div class="container-fluid">
            <a class="navbar-brand" href="#">Navbar</a>
            <button class="navbar-toggler" type="button" data-bs-toggle="collapse"
                data-bs-target="#navbarSupportedContent" aria-controls="navbarSupportedContent" aria-expanded="false"
                aria-label="Toggle navigation">
                <span class="navbar-toggler-icon"></span>
            </button>
            <div class="collapse navbar-collapse" id="navbarSupportedContent">
                <ul class="navbar-nav me-auto mb-2 mb-lg-0">
                    <li class="nav-item">
                        <a class="nav-link active" aria-current="page" href="#">Home</a>
                    </li>
                    <li class="nav-item">
                        <a class="nav-link" href="#">Link</a>
                    </li>
                    <li class="nav-item dropdown">
                        <a class="nav-link dropdown-toggle" href="#" role="button" data-bs-toggle="dropdown"
                            aria-expanded="false">
                            Dropdown
                        </a>
                        <ul class="dropdown-menu">
                            <li><a class="dropdown-item" href="#">Action</a></li>
                            <li><a class="dropdown-item" href="#">Another action</a></li>
                            <li>
                                <hr class="dropdown-divider">
                            </li>
                            <li><a class="dropdown-item" href="#">Something else here</a></li>
                        </ul>
                    </li>
                    <li class="nav-item">
                        <a class="nav-link disabled">Disabled</a>
                    </li>
                </ul>
                <form class="d-flex" role="search">
                    <input class="form-control me-2" type="search" placeholder="Search" aria-label="Search">
                    <button class="btn btn-outline-success" type="submit">Search</button>
                </form>
            </div>
        </div>
    </nav>

看起來(lái)你有一些HTML問(wèn)題，我甚至不能看到你的例子中的下拉菜單。這種方式適合我，我可以看到下拉菜單的顏色發(fā)生了變化。還不清楚你到底想要什么顏色，但是這個(gè)可能會(huì)幫你找到。

/* navbar */

.navbar-nav {
  font-weight: bold !important;
}


/* navbar bgn color */

.nav-item a,
.nav-item a:link,
.nav-item a:visited {
  color: var(--bodyPage) !important;
}


/* navbar item font color */

.nav-item a:hover,
.nav-item a:focus {
  color: var(--linkHover) !important;
}


/* navbar item hover font color */

.active a,
.nav-item .active a:link,
.active a:visited {
  color: var(--navActive) !important;
}


/* active navbar item font color */

.active a:hover,
.active a:focus {
  color: var(--linkHover) !important;
}


/* active navbar item hover font color */


/* links */

a,
a:link,
a:visited {
  color: var(--link);
}

a:hover,
a:focus {
  color: var(--linkHover);
}

.site-footer a,
.site-footer a:link,
.site-footer a:visited {
  color: var(--link);
}


/* footer link color */

.site-footer a:hover,
.site-footer a:focus {
  color: var(--linkHover);
}


/* footer hover link color */

.site-page a,
.site-page a:link,
.site-page a:visited {
  color: var(--link);
}


/* page body link color */

.site-page a:hover,
.site-page a:focus {
  color: var(--linkHover);
}


/* page body hover link color */

.banner a,
.banner a:link,
.banner a:visited {
  color: var(--link);
}


/* banner link color */

.banner a:hover,
.banner a:focus {
  color: var(--linkHover);
}


/* banner hover link color */

.no-banner a,
.no-banner a:link,
.no-banner a:visited {
  color: var(--link);
}


/* no banner link color */

.no-banner a:hover,
.no-banner a:focus {
  color: var(--linkHover);
}


/* no banner hover link color */

.navbar-default .navbar-toggle {
  background-color: red !important;
}

@media (max-width:992px) {
  .navbar-nav {
    background-color: black !important;
    padding: 8px !important;
  }
}


/* dropdown menu */

.dropdown-menu {
  background-color: rgb(99, 97, 97) !important;
}

.dropdown-item a:hover {
  background-color: rgb(0, 0, 0) !important;
}

<link rel="stylesheet"  integrity="sha384-MCw98/SFnGE8fJT3GXwEOngsV7Zt27NXFoaoApmYm81iuXoPkFOJwJ8ERdknLPMO" crossorigin="anonymous">

<script src="https://code.jquery.com/jquery-3.3.1.slim.min.js" integrity="sha384-q8i/X+965DzO0rT7abK41JStQIAqVgRVzpbzo5smXKp4YfRvH+8abtTE1Pi6jizo" crossorigin="anonymous"></script>
<script src="https://cdn.jsdelivr.net/npm/popper.js@1.14.3/dist/umd/popper.min.js" integrity="sha384-ZMP7rVo3mIykV+2+9J3UJ46jBk0WLaUAdn689aCwoqbBJiSnjAK/l8WvCWPIPm49" crossorigin="anonymous"></script>
<script src="https://cdn.jsdelivr.net/npm/bootstrap@4.1.3/dist/js/bootstrap.min.js" integrity="sha384-ChfqqxuZUCnJSK3+MXmPNIyE6ZbWh2IMqE241rYiqJxyMiZ6OW/JmZQ5stwEULTy" crossorigin="anonymous"></script>




<header class="site-wrap" id="home-section">
  <header class="container-fluid sticky site-header" id="headerSite">
    <div class="container">
      <nav class="navbar navbar-expand-lg navbar-light bg-light">
        <a class="navbar-brand" href="#">Navbar</a>
        <button class="navbar-toggler" type="button" data-toggle="collapse" data-target="#navbarSupportedContent" aria-controls="navbarSupportedContent" aria-expanded="false" aria-label="Toggle navigation">
          <span class="navbar-toggler-icon"></span>
        </button>

        <div class="collapse navbar-collapse" id="navbarSupportedContent">
          <ul class="navbar-nav mr-auto">
            <li class="nav-item"><a href="/dashboard" class="nav-link">Dashboard</a></li>            
            <li class="nav-item dropdown">
              <a class="nav-link dropdown-toggle" href="#" id="navbarDropdown" role="button" data-toggle="dropdown" aria-haspopup="true" aria-expanded="false">
                database
              </a>
              <div class="dropdown-menu" aria-labelledby="navbarDropdown">
                <a class="dropdown-item" href="#">table1</a>
                <a class="dropdown-item" href="#">table2</a>
                <a class="dropdown-item" href="#">table3</a>
            </li>
          </ul>
        </div>
      </nav>
    </div>
  </header>