Change opacity bootstrap navbar - css

Question

I'm trying to make my navbar semitransparent on this code but I'm not able to do it:
<nav class="navbar navbar-default navbar-fixed-top transparent" >
<div class="container">
<div class="container-fluid">
<!-- Brand and toggle get grouped for better mobile display -->
<div class="navbar-header">
<button type="button" class="navbar-toggle collapsed" data- toggle="collapse" data-target="#bs-example-navbar-collapse-1">
<span class="sr-only">Toggle navigation</span>
<span class="icon-bar"></span>
<span class="icon-bar"></span>
<span class="icon-bar"></span>
</button>
<a class="navbar-brand" href="/">brand</a>
</div>
<!-- Collect the nav links, forms, and other content for toggling -->
<div class="collapse navbar-collapse" id="bs-example-navbar-collapse-1">
<ul class="nav navbar-nav">
<li class="active">Home <span class="sr-only">(current)</span></li>
<li>Searches</li>
<li>Contact</li>
</ul>
<form class="navbar-form navbar-left" role="search">
<div class="form-group">
<input type="text" class="form-control" placeholder="Search">
</div>
<button type="submit" class="btn btn-default">Submit</button>
</form>
<ul class="nav navbar-nav navbar-right">
<li class="dropdown">
Legal <span class="caret"></span>
<ul class="dropdown-menu" role="menu">
<li>Terms</li>
<li>DMCA</li>
<li>RTA</li>
<li class="divider"></li>
<li>Contact</li>

Answer 1

Try this in your code, it worked for me -
give an id to the nav
like this-
<nav class="navbar navbar-default navbar-fixed-top transparent" id="nav1">
Then apply this in your css-
#nav1
{
background-color:#F00; /*whichever you want*/
opacity: 0.5;
filter:(opacity=50);
}

Answer 2

in your bootstrap.css find the navbar you are using, for example, if you're using the default navbar search for .navbar-default or .navbar-inverted as per your case and set the opacity simply using the CSS opacity command.
Did the job for me.

Answer 3

It would be nice to see the orginal CSS.
Paste the css code that shows the opacity.
The way I see your problem I think you did not write the path correct enough so it doesn't overwrite the original css from bootstrap.
<div id="wrapper">
<div class="container">
<div class="nav">
<p>tessssssssssssssst</p>
<div>
</div>
</div>
#wrapper .container .nav{
background-color: red;
opacity: 0.3;
}
#wrapper .nav {
opacity: 1.0;
}
http://jsfiddle.net/7h4hrvhu/