no space in the top, right and left side of the layout

Hello,
I begin a layout for my new page, and the design I produce with html and css.
In the top of the page, the blue bar (contains logo), is not in the top, because have a white bar. The same thing for the right a nd left of blue bar.
I want to know how I put the blue bar in the top, right and left, without white space.
CSS CODE
 
BODY {
  background-color: #ffffff;
}
 
#barra {
  position: relative;
  height: 120px;
  background-color: #3300cc;
  position: relative;
}
 
#barra_contem{
  margin-left: auto;
  margin-right: auto;
  width: 770px;
  height: 120px;
  position: relative;
}
 
 
 
/*#geral {
  margin-left: auto;
  margin-right: auto;
  width: 770px;
  height: 500px;
  background-color: white;
}*/
 
#logo {
  position: relative;
  margin-left: 25px;
  padding-top: 15px;
}
 
HTML CODE
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
<title>gloradin websites</title>
<style type="text/css" media="screen">
@import "/estilo/index.css";
</style>
</head>
 
<body>
<div id="barra">
  <div id="barra_contem">
    <div id="logo"><img src="imagem/logo_branco.jpg" /></div>
  </div>
</div>
 
 
<!--<div id="geral">
</div>-->
</body>
</html>

Open in new window

css.jpg
LVL 4
Pedro ChagasWebmasterAsked:
Who is Participating?

[Product update] Infrastructure Analysis Tool is now available with Business Accounts.Learn More

x
I wear a lot of hats...

"The solutions and answers provided on Experts Exchange have been extremely helpful to me over the last few years. I wear a lot of hats - Developer, Database Administrator, Help Desk, etc., so I know a lot of things but not a lot about one thing. Experts Exchange gives me answers from people who do know a lot about one thing, in a easy to use platform." -Todd S.

Roger BaklundCommented:
Use this in your css:
BODY {
  background-color: #ffffff;
  padding:0;
  margin:0;
}

Open in new window

0

Experts Exchange Solution brought to you by

Your issues matter to us.

Facing a tech roadblock? Get the help and guidance you need from experienced professionals who care. Ask your question anytime, anywhere, with no hassle.

Start your 7-day free trial
quincydudeCommented:
Or this if you do not want the bottom part get zero margin


BODY {
  background-color: #ffffff;
  padding-left:0;
  padding-right:0;
  padding-top:0;
  margin-left:0;
  margin-right:0;
  margin-top:0;
  
}

Open in new window

0
It's more than this solution.Get answers and train to solve all your tech problems - anytime, anywhere.Try it for free Edge Out The Competitionfor your dream job with proven skills and certifications.Get started today Stand Outas the employee with proven skills.Start learning today for free Move Your Career Forwardwith certification training in the latest technologies.Start your trial today
Web Languages and Standards

From novice to tech pro — start learning today.