.aui-color {
  &-image,
  &-imagedark {
    background-attachment: fixed;
    background-repeat: no-repeat;
    background-position: center;
    background-size: cover;
  }
  &-image {
    background-image: url('../content/image.jpg');
  }
  &-imagedark {
    background-image: url('../content/image-dark.jpg');
  }
}