Visited link color changes

I have this class:

.news_item_info 
{
    font-size: .7em; 
    color:#000000; 
    text-indent: 30px;
    a:link { color: #000000; }
    a:visited { color: #000000; } 
}

Here its with code:

<div class="news_item_info">
    <?php echo $articles[$index]->getPoints(); ?> puntos por <span class="news_item_user"><a href="/index.php?action=user&param=<?php echo $articles[$index]->getUsername(); ?>">
    <?php echo $articles[$index]->getUsername(); ?></a> </span>
    <?php echo $articles[$index]->getElapsedDateTime(); ?> | <span class="comments_count"><a href="<?php echo "/index.php?action=comments&param=".$articles[$index]->getId(); ?>"><?php echo $articles[$index]->getNumberOfComments($articles[$index]->getId()); ?> comentarios</a></span>
</div>

The problem is that after I visit the user profile it shows as gray and I want to keep the black color.

If anyone knows the answer I will appreciate it.

From stackoverflow

• The CSS posted is invalid, you have to qualify the styles by cascading definition. Try un-nesting your link definitions like so:

  .news_item_info 
  {
      font-size: .7em; 
      color:#000000; 
      text-indent: 30px;       
  }
  
  .news_item_info a:link { color: #000000; }
  .news_item_info a:visited { color: #000000; }
  

• You can't do CSS like that (nested blocks).

  .news_item_info 
  {
      font-size: .7em; 
      color:#000000; 
      text-indent: 30px;
  }
  
  .news_item_info a:link { color: #000000; }
  .news_item_info a:visited { color: #000000; }
  

• I would take the colour out into it's own rule.

  .news_item_info 
  {
      font-size: .7em; 
      text-indent: 30px;
  }
  
  .news_item_info, .news_item_info a:link, .news_item_info a:visited
  {
      color: #000;
  }
  

  That way you only need to change the one thing if you ever want to change the colour.

  alternatively, if you wanted all elements within the div.news_item_info element to be black, you could use this selector instead

  .news_item_info, .news_item_info *
  

  Antony Scott : rather than just voting me down - i'd prefer people to tell me why they've done it. it's very frustrating to just get a down vote with no explanation.