.hero-underground-supply {
  background:
    linear-gradient(135deg, rgba(9, 31, 44, 0.90) 0%, rgba(12, 53, 71, 0.86) 50%, rgba(19, 75, 99, 0.80) 100%),
    url('../images/underground-supply-line-repair-littleton-co-hero.jpg') center/cover no-repeat;
}