Hi Seth,
Unfortunately, i can't access to the document page because i don't have account. Regarding to your question, Edocman use Bootstrap class for buttons, there are some class names:
btn btn-primary
btn btn-danger
btn btn-warning
btn btn-info
btn btn-inverse
You can change the button class name from btn btn-primary to other remain class names. You can open file:
components > com_edocman > view > common > documents_default.php
To find btn-primary and change to other class name.
Thanks
Dam