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                <h3 class="text-center">Simple Mailchimp form custom css</h3>
<div class="container">
  <div class="row">
    <div id="mc_embed_signup" class="col-md-6 col-md-offset-3">
      <form action="#Your_form_URL" method="post" id="mc-embedded-subscribe-form" name="mc-embedded-subscribe-Form" class="validate" target="_blank" novalidate>
        <div id="mc_embed_signup_scroll">
          <h4 class="text-center">Subscribe to learn more about our app</h4>
          <div class="mc-field-group form-group input-group col-md-offset-2">
            <input type="email" placeholder="Email" value="" name="EMAIL" class="required email form-control" id="mce-EMAIL">
            <span class="input-group-btn">
                                      <button type="submit" name="subscribe" id="mc-embedded-subscribe" class=" btn btn-default">
                                         Call to action
          <div id="mce-responses" class="clear">
            <div class="response" id="mce-error-response" style="display:none"></div>
            <div class="response" id="mce-success-response" style="display:none"></div>
          <!-- real people should not fill this in and expect good things - do not remove this or risk form bot signups-->
          <div style="position: absolute; left: -5000px;">
            <input type="text" name="b_c5e3bd70ef8ad894b64c2d48d_696b0cd28b" tabindex="-1" value="">
          <div class="clear"></div>



                /* form wrapper */

#mc_embed_signup {
  padding: 2em;
  border-radius: 5px;
  margin-bottom: 1em;
  background-color: #e74c3c;
/* form heading css */

#mc_embed_signup_scroll h4 {
  margin: 0 0 25px 0;
  font-size: 1.9em;
  color: #fff;

/* input email css  */
#mce-EMAIL {
  padding: 1.5em;
  margin-bottom: 10px;

/* input button css */
#mc-embedded-subscribe {
  padding: 0.8em;
  color: #fff;
  margin-bottom: 10px;
  background-color: #f39c12;