main.css

header{
  padding: 10px;
  color:white;
  font-size: 36px;
  padding-left:20px;
  text-align:center; 
  font-family: 'Trebuchet MS', Helvetica, sans-serif;
}

footer{
  text-align:center;
  padding: 10px;
  color:white;
  font-size: 18px;
}

#canvas{
  border-radius: 5px;
  margin-top: 5px;
  background-color: white;
  
}
#canvas_container{
  text-align:center;
}
h1{
  text-align:center;
  color:blue;
}
.button_c{
  text-align:center;
}
button{
  background-color:#555555;
  color: white;
  padding: 10px 15px;
  text-align:center;
  display:inline-block;
  font-size: 16px;
  font-family:'Trebuchet MS';
  border:none;
  margin-top: 8px;
  margin-bottom: 8px;
  border-radius:5px;
}
#colors{
  text-align: center;
}
body{
  background-image: url("http://inside.unbounce.com/wp-content/uploads/pattern-abstract-hd-wallpaper-1920x1200-6110.jpg");
  background-size: 100%;
  background-repeat: no-repeat; 
  margin:0px;
}