AdminLte/build/scss/_brand.scss

.brand-link {
  $brand-link-padding-y: $navbar-brand-padding-y + $navbar-padding-y;
  padding: $brand-link-padding-y $sidebar-padding-x;
  font-size: $navbar-brand-font-size;
  display: block;
  line-height: $line-height-lg;
  white-space: nowrap;

  &:hover {
    color: $white;
    text-decoration: none;
  }

  [class*="sidebar-dark"] & {
    color: rgba(255,255,255,.8);
    border-bottom: 1px solid lighten($dark, 10%);
  }

  [class*="sidebar-light"] & {
    color: rgba(0,0,0,.8);
    border-bottom: 1px solid $gray-300;
  }
}

.brand-image {
  float:left;
  line-height: .8;
  max-height: 34px;
  width: auto;
  margin-left: .8rem;
  margin-right: .5rem;
  margin-top: -3px;
}