title: How to make gradual colour change when hover with CSS?
body: <p>I'm trying to make a gradual background colour change from normal to a hover colour, but, unfortunately, everything I've read and tried didn't work. This is the code I have:</p>
  
  <p><div class="snippet" data-lang="js" data-hide="false">
  <div class="snippet-code">
  <pre class="snippet-code-css lang-css prettyprint-override"><code>.button-submit {
       color: #ffffff;
       cursor: pointer;
       display: inline-block;
       line-height: 35px;
       background: #5ea12b;
       padding: 0px 20px;
       vertical-align: middle;
       font-size: 18px;
       min-width: 80px;
       min-height: 35px;
       font-family: Light;
       border: 1px solid transparent;
       margin: 5px;
  }
  .button-submit:hover {
       background: #5ea12b;
       color: #FFFFFF;
  }</code></pre>
  </div>
  </div>
  </p>