CSS H1 tag Relative Positioning

Hello

Is there anyway I can remove the green bar from under my header and above my naviagtion on the following webpage. I have relatively positioned the Memorial Cards Ireland tag to the top right of the banner picture.

http://www.reflectionsmemorialcards.co.uk/memorialIreland/index2.html#

 .header h1 {
      font-family: "Trajan Pro";
      color: #1f8a9a;
      font-weight: 900;
      font-size: 24px;
      position: relative;
      top: -160px;
      left: 500px;
      margin: 0px;
      padding: 0px;
}

<!--HTML Code Below-->

  <div class="header">
   <img src="bannerH1.jpg" width ="900" height ="160">
              <h1>Memorial Cards Ireland</h1>
</div>