Without a link or more information there is little that anyone can help with, however here is how you can find the answer you seek.
You should check this out for customizing your site.
http://themesandco.com/snippet/firebug-best-spent-6-minutes/
http://getfirebug.com
Thanks, but there is a link on the top.
I’ll post it again.
(IMAGE)
Posting an image won’t help here. Cannot get selector information from that. Check out the links I gave you, firebug will help you figure out the selectors you need to make the changes you want. Then you can add your css to the site preferably through a Child-Theme.
This is an admin side. Anyone can replicate this by clicking any wordpress admin button. I have tried chrome “inspect element” and “firebug” but still can’t find the class.
Thanks
EDIT: for example go to pages and then click the “apply” or “filter” button with right mouse button and you see the blue “border”. That is the one I cannot remove.
Got it
a:active, a:focus, .button {box-shadow: 0 0 0px!important;}
