body{
  background: linear-gradient(43deg, rgba(245, 245, 245, 0.623) 0%, rgba(245, 245, 245, 0.623) 46%, rgba(245, 245, 245, 0.623) 100%),url(https://wallpapercave.com/wp/wp5107611.jpg) no-repeat center center fixed; 
  -webkit-background-size: cover;
  -moz-background-size: cover;
  -o-background-size: cover;
  background-size: cover;
}
background-color: #4158D0;
background-image: linear-gradient(43deg, #4158D0 0%, #C850C0 46%, #FFCC70 100%);