Add a dark overlay to background image

Question

I've looked at several SO posts about this: I want to darken the current background image by adding an overlay.

 #header1 { background: url("http://lorempixel.com/image_output/cats-qc-640-480-10.jpg"); background-position:center center; position: relative; background-size: cover; padding-bottom:5em; }.overlay { background-color: rgba(0, 0, 0, 0.7); top: 0; left: 0; width: 100%; height: 100%; position: relative; z-index: 1; }

 <div class="header"> <div class="overlay"> <div class="jumbotron" id="header1"> <h1>Hello</h1> </div> </div> </div>

Maybe I'm not understanding how to use z-index, or maybe I'm missing something here. The darker background used for tinting isn't showing up. Any pointers?

Answer 1

Use Linear gradient

to darken the background refer to this codepen and this link

<div class="bg-img"></div>

.bg-img {
  width: 100%;
  height: 100%;
  background: url('http://alexcarpenter.me/img/banner.jpg') center center no-repeat;
  background-size: cover;

  &:before {
    content: '';
        position: absolute;
        top: 0;
        right: 0;
        bottom: 0;
        left: 0;
        background-image: linear-gradient(to bottom right,#002f4b,#dc4225);
        opacity: .6; 
  }
}

Answer 2

 #header1 { background: url("https://www.random.org/analysis/randbitmap-rdo.png");/*Random image I grabbed*/ background-size: cover; } h1 { color: white; background-color: rgba(0, 0, 0, 0.7); padding-top: 10px; padding-bottom: 100px; padding-left: 20px; padding-right: 20px; }

 <div class="header"> <div class="overlay"> <div class="jumbotron" id="header1"> <h1>Hello</h1> </div> </div> </div>

As intended the h1 acts as an extra visual layer and its padding covers the #header1.

A second solution would be to add the original background image to .header and have the styles from h1 given to #overlay and with a bit of tweaking that should also do the trick.

And yet another possible solution(similar to the second one) you can add the background-image to overlay and have the h1 styles from the example I gave to #header1 or .jumbotron

In addition to the first solution, you should be able to add extra layer by adding a background-color: to overlay. I'm not sure how it will effect the background exactly but from what I'm guessing it should just add an extra layer of color.

Here is a personal example where I used this technique.

Example

Answer 3

The z-index property specifies the stack order of an element. An element with greater stack order is always in front of an element with a lower stack order. for your answer, you can visit css-tricks

Answer 4

I guess you would like to completely hide the background image, Then you need to set the value of alpha to 1 in rgba(0,0,0,1)

0.7 defines the transparency level you need the particular element to be shown.

below link explain concept of overlaying with very good examples

http://tympanus.net/codrops/2013/11/07/css-overlay-techniques/

Answer 5

#header1 {
background: url("https://www.random.org/analysis/randbitmap-rdo.png");/*Random image I grabbed*/,
box-shadow: "0px 4px 4px 0px #00000040,inset 0 0 0 1000px rgba(0,0,0,.5)"
}

You don't need the overlay if you add a box shadow. The inner box-shadows work as an overlay. You can adjust the opacity by changing the .5 up or down.

Answer 6

You can also use this CSS:

filter: brightness(50%);