zcash-grant-system/backend/grant/templates/emails/team_invite.html

<p style="margin: 0;">
  You’ve been invited by <strong>{{ args.inviter.display_name }}</strong> to
  join the team for
  <strong>{{ args.proposal.title or '<em>Untitled Project</em>'|safe }}</strong
  >, a project on Grant.io! If you want to accept the invitation, continue to
  the site below.
</p>

{% if not args.user %}
<p style="margin: 20px 0 0;">
  It looks like you don't yet have a Grant.io account, so you'll need to sign up
  first before you can join the team.
</p>
{% endif %}

<table width="100%" border="0" cellspacing="0" cellpadding="0">
  <tr>
    <td bgcolor="#ffffff" align="center" style="padding: 40px 30px 0 30px;">
      <table border="0" cellspacing="0" cellpadding="0">
        <tr>
          <td align="center" style="border-radius: 3px;" bgcolor="#530EEC">
            <a
              href="{{ args.invite_url }}"
              target="_blank"
              style="font-size: 20px; font-family: Helvetica, Arial, sans-serif; color: #ffffff; text-decoration: none; color: #ffffff; text-decoration: none; padding: 20px 50px; border-radius: 4px; border: 1px solid #530EEC; display: inline-block;"
            >
              {% if args.user %} See invitation {% else %} Get started {% endif
              %}
            </a>
          </td>
        </tr>
      </table>
    </td>
  </tr>
</table>