html - centering images within a sidebar -


trying best practices here , i'm new coding. have 2 images in right sidebar. sidebar looks (colored red see what's up) can't 2 images centered in column. what's wrong css?

html:

<div class="right_bar">  		<div class="sponsor_button"><img src="images/nav_images/uconn-grant-logo.png" alt="sponsored in part university of connecticut's research grant";></div class="sponsor_button">      	<div><img src="images/nav_images/usitt.png" alt="sponsored in part usitt";>        		</div>      </div>

css:

.right_bar {  	position:absolute;  	right:0;  	width: 20%;  	background-color: red;  	  }    .sponsor_button img {  	margin-left:auto;  	margin-right:auto;  }

you need display: block on images margin: 0 auto work:

.sponsor_button img {     display: block;     margin-left: auto;     margin-right: auto; }

or try text-align: center on container:

.right_bar {     text-align: center; }

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