Description: The image link is missing an alternative text stating the purpose of the link.
Context: All images should provide an alternative
<a style="color: rgb(12, 109, 72);" href="https://uhmanoa.lib.hawaii.edu/vwebv/searchBasic?sk=manoa">
<img class="img-responsive" src="/library/wp-content/uploads/2017/07/canoe-1.png" alt="">
</a>
How to fix it: If for instance it links to a web page, state the topic of that page.
<a style="color: rgb(12, 109, 72);" href="https://uhmanoa.lib.hawaii.edu/vwebv/searchBasic?sk=manoa">
<img class="img-responsive" src="/library/wp-content/uploads/2017/07/canoe-1.png" alt="Search materials">
</a>