overlay for background css code example
Example 1: background overlay css
html {
min-height:100%;
background:linear-gradient(0deg, rgba(255, 0, 150, 0.3), rgba(255, 0, 150, 0.3)), url(http://lorempixel.com/800/600/nature/2);
background-size:cover;
}
Example 2: css background overlay
.image:before{
content: "";
background: rgba(0,0,0,.6);
content: "";
position: absolute;
top: 0;
left: 0;
right: 0;
bottom: 24px;
}