.hero {
  background-image: url(../img/backgrounds/b05.jpg);
  background-position: center center;
  background-repeat: no-repeat;
  background-attachment: fixed;
  background-size: cover;
  background-color: #999; 
  height: 100vh;

}

.hero-body{
  background-color: rgba(0, 0, 0, 0.7);
}