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在Bootstrap 4中,如何更改导航栏的背景颜色？twbscolor的代码不起作用.我想使背景颜色为不同颜色,字体颜色为白色.

<nav class="navbar navbar-toggleable-md navbar-light bg-danger">
        <button class="navbar-toggler navbar-toggler-right" 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>
        <a class="navbar-brand" href="#">Jordan Baron</a>

    <div class="collapse navbar-collapse" id="navbarSupportedContent">
        <ul class="navbar-nav mr-auto">
            <li class="nav-item active">
                <a class="nav-link" href="#">Home</a>
            </li>
        </ul>
    </div>
</nav>