tinman21689 on "Child Nav Menu CSS"

I am attempting to change the nav menu colors within a corpo-child theme, however the changes I make are being overwritten by the parent theme.

These codes show up in firebug but the parent theme css is active first.
nav#main-nav > ul > li.current-menu-item > a {
color: #2CEDED;
}
nav#main-nav > ul > li.current_page_item > a {
color: #2CEDED;
}
nav#main-nav > ul > li:hover > a {
color: #2CEDED;
}

This code managed to work though.
nav#main-nav > ul > li > a {
color: #fff
}

My site is gordonwebco.com and I appreciate any help. Thank you.