It's core css.

Override it in a plugin.

See http://community.elgg.org/plugins/839775/1.8.3/customize-css for how to do it.

Thanks Matt for the plugin. I normally copy the core views codes to my custom theme and modify it there. I will use the plugin. It is neat. The issue here is I cannot even find the name of the views in order to modify it. The Inspect's CSS says: a {color: #4690D6;} a{text-decoration: none;}. It says it is in the reset.php, but when I open the file, it is not there. All I want to do is change the background and color of text of mini-profile link on the sidebars. I wish I could attach the image of what the Inspect is saying. 

Is there anyway on Elgg I can send the image of what I'm trying to change? 

Matt, you can see the image in my profile picture :). 

hi you want to change in side bar or profile page?

You need to make your css rules as or more specific than what's already defined: http://coding.smashingmagazine.com/2007/07/27/css-specificity-things-you-should-know/

Does anyone know the the location of the CSS file that conrols this link or the name of the section (for example, .elgg-menu-owner-block li a)? The Inspect's CSS panel is givving obscure names (with some parts of the name greyed out) and files (it says it is in the 209th line of reset.php, but when you go to the reset.php file, it is not there because the file does not go beyond line 79). I've put the image concerning this issue in my profile. Thanks a lot.  

Thanks Matt. The link is good. 

looks like it is controlled by elgg.css with id="profile-details" and class="elgg-body pll"

That's okay. I'll keept it as is.