Change link color

I’d like to change the link colors from #13c4a5 in my child theme. I tried this but it didn’t work:

.post-link a {
color: #13C4A5;
padding-left: 23px;
background: url(images/icons/1x/link-c.png) no-repeat left center;
background-size: 16px auto;
}

I changed the color to #e0bc50 but no luck.

Thanks.