Background-color behind a border-radius

Question

I was wondering, is it possible to set a background-color behind the border-radius?

I want to achieve this effect:

I use this HTML:

<div class="content-header" tabindex="-1">
    <span class="html">TITLE</span>
</div>
<div class="content-txt-v2" tabindex="-1">
  <p>
  Content
  </p>        
</div>

and I use this CSS:

.content-header {
    height: 18px;
    line-height: 18px;
    background-color: #4C741B;
    margin-top: 20px;
    float: left;
    -moz-border-radius: 10px 10px 0px 0px;
    -webkit-border-radius: 10px 10px 0px 0px;
    -khtml-border-radius: 10px 10px 0px 0px;
    border-radius: 10px 10px 0px 0px;    
    padding: 0px 14px;
    font-weight: bold;
    font-size: 14px;
    color:#fff;
}
.content-txt-v2 {
    clear: both;
    width: 669px;
    padding: 0 10px;
    margin: 0px auto;
      border: 2px solid #E9EAE3;
    -moz-border-radius: 20px 10px 10px 10px;
    -webkit-border-radius: 20px 10px 10px 10px;
    -khtml-border-radius: 20px 10px 10px 10px;
    border-radius: 20px 10px 10px 10px;
    float:left;
    background-color:red;
}

I added the above code in a JSFIDDLE

I tried to set the background-color of my content-txt-v2 div but with no succes. Can anyone guide me in the right direction? Is it possible with only two div's? or should I add more objects?

Answer 1

That is pretty hard to do, but you can fake it: https://jsfiddle.net/85c8ss94/1/

.content-header {
    height: 30px;
    line-height: 18px;
    background-color: #4C741B;
    margin-top: 20px;
    float: left;
    -moz-border-radius: 10px 10px 0px 0px;
    -webkit-border-radius: 10px 10px 0px 0px;
    -khtml-border-radius: 10px 10px 0px 0px;
    border-radius: 10px 10px 0px 0px;    
    padding: 0px 14px;
    font-weight: bold;
    font-size: 14px;
    color:#fff;
    margin-bottom: -12px;
}
.content-txt-v2 {
    clear: both;
    width: 669px;
    padding: 0 10px;
    margin: 0px auto;
    border: 2px solid #E9EAE3;
    -moz-border-radius: 20px 10px 10px 10px;
    -webkit-border-radius: 20px 10px 10px 10px;
    -khtml-border-radius: 20px 10px 10px 10px;
    border-radius: 20px 10px 10px 10px;
    float:left;
    background-color:red;
}

Answer 2

Why don't you do something like this? it gives you desired output without much headache!

 * { box-sizing: border-box; } .content-header { height: 18px; line-height: 18px; background-color: #4C741B; margin-top: 20px; float: left; -moz-border-radius: 10px 10px 0px 0px; -webkit-border-radius: 10px 10px 0px 0px; -khtml-border-radius: 10px 10px 0px 0px; border-radius: 10px 10px 0px 0px; padding: 0px 14px; font-weight: bold; font-size: 14px; color: #fff; z-index: 10; /* z-index same as red bar*/ position: relative; } .content-header:after { position: absolute; top: 100%; left: 0; content: ''; background: #4C741B; width: 18px; height: 18px; display: block; z-index: 5; /* z-index less than red bar*/ } .content-txt-v2 { clear: both; width: 669px; padding: 0 10px; margin: 0px auto; border: 2px solid #E9EAE3; -moz-border-radius: 20px 10px 10px 10px; -webkit-border-radius: 20px 10px 10px 10px; -khtml-border-radius: 20px 10px 10px 10px; border-radius: 20px 10px 10px 10px; float: left; background-color: red; position: relative; /* for giving z-index */ z-index: 10; /* z-index equal to title block */ } 

 <div class="content-header" tabindex="-1"> <span class="html">TITLE</span> </div> <div class="content-txt-v2" tabindex="-1"> <p> Content </p> </div>