freeCodeCamp/curriculum/challenges/english/01-responsive-web-design/basic-css/add-a-negative-margin-to-an-element.english.md

---
id: bad87fee1348bd9aedf08823
title: Add a Negative Margin to an Element
challengeType: 0
videoUrl: 'https://scrimba.com/c/cnpyGs3'
forumTopicId: 16166
---

## Description
<section id='description'>
An element's <code>margin</code> controls the amount of space between an element's <code>border</code> and surrounding elements.
If you set an element's <code>margin</code> to a negative value, the element will grow larger.
</section>

## Instructions
<section id='instructions'>
Try to set the <code>margin</code> to a negative value like the one for the red box.
Change the <code>margin</code> of the blue box to <code>-15px</code>, so it fills the entire horizontal width of the yellow box around it.
</section>

## Tests
<section id='tests'>

```yml
tests:
  - text: Your <code>blue-box</code> class should give elements <code>-15px</code> of <code>margin</code>.
    testString: assert($(".blue-box").css("margin-top") === "-15px");

```

</section>

## Challenge Seed
<section id='challengeSeed'>

<div id='html-seed'>

```html
<style>
  .injected-text {
    margin-bottom: -25px;
    text-align: center;
  }

  .box {
    border-style: solid;
    border-color: black;
    border-width: 5px;
    text-align: center;
  }

  .yellow-box {
    background-color: yellow;
    padding: 10px;
  }

  .red-box {
    background-color: crimson;
    color: #fff;
    padding: 20px;
    margin: -15px;
  }

  .blue-box {
    background-color: blue;
    color: #fff;
    padding: 20px;
    margin: 20px;
  }
</style>

<div class="box yellow-box">
  <h5 class="box red-box">padding</h5>
  <h5 class="box blue-box">padding</h5>
</div>
```

</div>



</section>

## Solution
<section id='solution'>

```html
<style>
  .injected-text {
    margin-bottom: -25px;
    text-align: center;
  }

  .box {
    border-style: solid;
    border-color: black;
    border-width: 5px;
    text-align: center;
  }

  .yellow-box {
    background-color: yellow;
    padding: 10px;
  }

  .red-box {
    background-color: crimson;
    color: #fff;
    padding: 20px;
    margin: -15px;
  }

  .blue-box {
    background-color: blue;
    color: #fff;
    padding: 20px;
    margin: 20px;
    margin-top: -15px;
  }
</style>

<div class="box yellow-box">
  <h5 class="box red-box">padding</h5>
  <h5 class="box blue-box">padding</h5>
</div>
```

</section>