div class="overlay" code example

Example 1: make background overlay css

#element-with-background-image {
   position: relative;
   background-image: url("//spin.atomicobject.com/wp-content/uploads/20170324102432/portfolio-tips-feature-image.jpg");
}
 
#color-overlay {
   position: absolute;
   top: 0;
   left: 0;
   width: 100%;
   height: 100%;
   background-color: black;
   opacity: 0.6;
}

Example 2: div color overlay css

box-shadow: inset 0 0 0 2000px rgb(0 0 0 / 67%);

Example 3: html overlay django

{% for instance in object_list %}
    <div align="center">
        <a href="#overlay{{ instance.pk }}">{{ instance.international_title }}</a>
    </div>
    <div id="overlay{{ instance.pk }}">
    <p>{{ instance.international_short_description }}<p>
    </div>
{% endfor %}