Since its difficult to create shapes using CSS in HTML emailer, i had to use image, but it kinda breaks in Gmail sometimes and creates a white line space, like shown below,

http://ibb.co/6b31QCd

My code for image,

<tr>
<td>
<img src="images/blue-arrow.jpg" alt="blue-arrow" width="600" height="46" style="display: block; border: 0; outline: 0;"/>
</td>
</tr>