Hi Ashley you need some CSS for this.
Open the template and switch to html mode.
Find the section with <style> and add:
a:link{color:#0066f9;text-decoration:underline;}
a:visited{color:#0066f9;text-decoration:underline;}
a:hover{color:#0066f9;text-decoration:underline;}
This will make sure all links on the page have underlining and are in the color #0066f9.
For the menu you have two options:
1. Add a class to the <a>, <a href="yoururl" class="myclass">anchortext</a>.
In the <style> add:
.myclass a:link{color:#FFFFFF;text-decoration:none;}
.myclass a:visited{color:#FFFFFF;text-decoration:none;}
.myclass a:hover{color:#FFFFFF;text-decoration:none;}
2. Or you can add it directly to the <a> itself:
<a href="yoururl" style="color:#FFFFFF;text-decoration:none;">anchortext</a>
Good luck!