JSFiddle - React, Tailwind, and code Playground

HTML

<div class="greenbar">
<div class="navigation"><ul id="menu-navigation-menu" class="menu"><li id="menu-item-107" class="menu-item menu-item-type-post_type menu-item-object-page menu-item-107"><a href="#">About</a>
<ul class="sub-menu">
	<li id="menu-item-116" class="menu-item menu-item-type-post_type menu-item-object-page menu-item-116"><a href="#">Terms of Use</a></li>
	<li id="menu-item-119" class="menu-item menu-item-type-post_type menu-item-object-page menu-item-119"><a href="#">Just another link</a></li>
</ul>
</li>
<li id="menu-item-106" class="menu-item menu-item-type-post_type menu-item-object-page menu-item-106"><a href="#">Services</a>
<ul class="sub-menu">
	<li id="menu-item-120" class="menu-item menu-item-type-post_type menu-item-object-page menu-item-120"><a href="#">Another link again</a></li>
</ul>
</li>
<li id="menu-item-105" class="menu-item menu-item-type-post_type menu-item-object-page menu-item-105"><a href="#">Clients</a></li>
<li id="menu-item-104" class="menu-item menu-item-type-post_type menu-item-object-page menu-item-104"><a href="#">Resources</a></li>
</ul></div> 
    </div>

CSS

.greenbar{
	height:54px;
	background-color:#59c5c1;
}
.navigation{
	float:left;
	width:670px;
	margin-top:16px;
}
.navigation li{
	float:left;
	list-style-type:none;
	padding-left:35px;
	font-size:18px;
	text-transform:uppercase;
}
.navigation a {
	color:#FFF;
	text-decoration:none;
}
.navigation a:hover {
	color:#b6f2f0;
}
.navigation ul ul {
	display: none;
	position: relative;
	top: 16px;
	height: 28px;
}
.navigation ul ul li {
	float: none;
	width: 200px;
	background-color:#59c5c1;
}
.navigation ul ul li a {
    margin-left: -25px;
}
.navigation ul li:hover > ul {
	display: block;
}