Welcome section height should equal viewport height

so I’ve passed 11/12 tests on my personal portfolio but i keep getting the same error regarding the welcome-section:

# 2. The height of the welcome section should be equal to the height of the viewport.

The height of #welcome-section is not equal to the height of the viewport : expected 591 to be close to 556 +/- 0*
AssertionError: The height of #welcome-section is not equal to the height of the viewport : expected 591 to be close to 556 +/- 0

the height of the welcome section is set to height: 100vh; and ive added the viewport meta tag. I also tried setting padding to 0 but it still wont pass the test.

HTML

<script src="https://cdn.freecodecamp.org/testable-projects-fcc/v1/bundle.js"></script>

<!DOCTYPE html>
<html lang="en" dir="ltr">
  <head>
    <meta name="viewport" content="width=device-width, initial-scale=1">
    <meta charset="utf-8">
    <script src="https://kit.fontawesome.com/42f1fd7b3c.js" crossorigin="anonymous"></script>
    <link rel="stylesheet" href="./style.css">
    <title>Matias | Web Design</title>
  </head>
  <body>
    <!-- NAV -->
    <nav id="navbar">
      <ul>
        <a href="#welcome-section"> <li class="nav_links">HOME</li></a>
        <a href="#projects"> <li class="nav_links">PROJECTS</li></a>
        <a href="#contact"> <li class="nav_links">CONTACT</li></a>
    </ul>
    </nav>
      <!-- NAV END -->


      <!-- WELCOME -->
      <section id="welcome-section">
        <div id="background">
          <h1>Matias</h1>
          <p>Web Design</p>
        </div>
      </section>
      <!-- WELCOME END -->


      
      <!-- PROJECTS -->
      <section id="projects">
        <h2>My <span>Work</span></h2>

        <div class="projects_cont">
          <div class="project-tile">
            <a href="https://codepen.io/matiaspereira/full/XWKMyvN" target="_blank">
              <img class="project_img" src="https://matias-pereira.github.io/images-repo/weedmo.png " alt="">
            </a>
          </div>

          <div class="project-tile">
            <a href="">
              <img class="project_img" src=" https://matias-pereira.github.io/images-repo/form.png " alt="">
            </a>
          </div>

          <div class="project-tile">
            <a href="">
              <img class="project_img" src=" https://matias-pereira.github.io/images-repo/technical.png " alt="">
            </a>
          </div>
        </div>
      </section>  
      <!-- PROJECTS END-->
        

    <!-- CONTACT -->
      <div id="contact_back">
        <section id="contact">
          <h2>Contact <span>Me</span></h2>
          <form action="">
            <input id="email" type="email" name="email " placeholder="Enter your Email adress" required>
            <textarea id="textarea" name="message" placeholder="Break the ice!"></textarea>
            <button id="send" type="submit" name="submit">SEND</button>
          </form>

          <div id="icons">
            <a id="profile-link" href="https://github.com/matias-pereira" target="_blank"><i class="i fab fa-github"></i>
            </a>
            <a href=""><i class="i fab fa-instagram"></i>
            </a>
            <a href=""><i class="i fab fa-facebook-square"></i>
            </a>
            <a href=""><i class="i fas fa-mobile-alt"></i></a>
          </div>
        </section>
      </div>

      
    <!-- CONTACT END -->

    <div id="footer">
      <footer>
        <p>this is a mock portfolio...... for now ;)</p>
        <p>Matias Web Design All Rights Reserved <i class="far fa-copyright"></i></p>
      </footer>
    </div>
  </body>
</html>

CSS

@import url('https://fonts.googleapis.com/css2?family=Lato&display=swap');

/* GLOBALS */
* {
  font-family: 'Lato', sans-serif;
}

body {
  padding: 0;
  margin: 0;
  background: rgb(122, 122, 122);
}

a {
  text-decoration: none;
}

span{
  color: rgb(57, 72, 201);
}
/* GLOBALS END */


/* HEADER/NAV */
#navbar {
  background: rgb(122, 122, 122);
  position: fixed;
  width: 100%;
  border-bottom: 5px  rgb(57, 72, 201) solid;
}

nav ul {
  list-style: none;
  padding: 0;
  margin: 0;
  display: flex;
  justify-content: space-evenly;
  text-align: center;
}

nav ul a {
  color: black;
}

.nav_links {
  padding: 30px;
  width: 80px;
}

.nav_links:hover {
  background: rgb(57, 72, 201);
  color: white;
}
/* HEADER/NAV END*/


/* WELCOME SECTION */
#welcome-section {
  padding-top: 30px;
  background-image: url(./background.jpg);
  background-attachment: fixed;
  height: 100vh;
  text-align: center;
  border-bottom: 5px  rgb(57, 72, 201) solid;
}

#welcome-section h1{
  margin-top: 250px;
  font-size: 70px;
}

#welcome-section p{
  font-size: 25px;
  color: rgb(57, 72, 201);
}
/* WELCOME SECTION END*/


/* PROJECTS */
#projects {
  margin: 150px 50px 0 50px;
  padding-top: 50px;
  height: 100vh;

}

#projects h2 {
  font-size: 50px;
  text-decoration: underline;
  text-decoration-color: rgb(57, 72, 201);
  text-align: right;
  ;
}

.projects_cont {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  column-gap: 20px;
  margin-top: 40px;
}

.project_img {
  width: 100%;
}

.project-tile:hover {
 border: 5px  rgb(57, 72, 201) solid;
}
/* PROJECTS END */


/* CONTACT */
#contact_back {
  background-image: url(./background.jpg);
  background-attachment: fixed;
  border-top: 5px  rgb(57, 72, 201) solid;
  height: 100vh;
}

#contact {
  margin: 180px 50px;
}

#contact h2 {
  font-size: 50px;
  text-decoration: underline;
  text-decoration-color: rgb(57, 72, 201);
}

#email {
  width: 100%;
  padding: 15px 20px;
  margin: 10px 0;
  box-sizing: border-box;
  border: none;
}

#textarea {
  width: 100%;
  min-height: 100px;
  padding: 15px 20px;
  margin: 10px 0;
  box-sizing: border-box;
  border: none;
}

button {
  width: 100%;
  text-align: center;
  color: white;
  margin-top: 5px;;
  padding: 15px;
  background:  rgb(57, 72, 201);
  border: none;
  box-sizing: border-box;
}

button:hover{
  background:  rgb(47, 60, 173);
}

.i {
  font-size: 40px;  
  margin-top: 50px;
  transition: transform .2s;
  color: black;
}

.i:hover {
  transform: scale(1.3);
}
#icons {
  margin: 90px 180px;
  display: flex;
  justify-content: center;
  justify-content: space-between;
}
/* CONTACT END */


/* MEDIA QUERIES */
@media(max-width: 768px) {

  /* NAVBAR */

  .nav-links {
    float: left;
  display: block;
  
  }
  /* NAVBAR END */



  /* PROJECTS */
  #projects h2 {
    text-align: center;
  }

  #projects{
    margin-top: 0;
    margin-bottom: 250px;
  }  

  .projects_cont {
    grid-template-columns: 100%;
  }

  .project-tile {
    margin-top: 20px;

  }
  /* PROJECTS END */


  /* CONTACT */
  #contact h2{
    text-align: center;
  }

  .i {
    padding: 15px;
  }

  #icons {
    display: flex;
    justify-content: center;
    margin: 40px 180px;

  }
  /* CONTACT END */
}

you can set to 0 on the body, but here you have a padding - look at the error message, how much do the two numbers differ?

35px, so 30px are there, there are other 5px to remove

Thanks! i tried that but it seems the problem was with the bottom border. i removed and passed all tests