Changing hyperlink color on header_contact_item only

I have the following hyperlinks in my sub-header and I am trying to resolve the CSS to change the hyperlink colors only on a hover event – and just in the sub-header header_contact_item class. How would I form the CSS to only change the hover color change within the header_contact_item class? Thanks.

/* hover link */
a:hover {
color: #81d742 !important;
background-color: inherit ;
}

<div class="full_header">
			<div id="subheader" class="container">	
				<div class="section">
						
								
						<div class="header_contacts ">
															<div class="header_contact_item"><span class="icon icon-mail2"></span> <strong><a title="Click to open Contact Page" href="http://test.slofostercare.com/home/contact/">Contact Us</a>&nbsp; | &nbsp;<a title="Click to view Frequently Asked Questions (FAQ)" href="http://test.slofostercare.com/home/about-us/#faq">FAQ</a>&nbsp;&nbsp;|&nbsp;&nbsp;<a title="Click to learn more about becoming a Resource Parent" href="http://test.slofostercare.com/home/services/">Become a Resource Parent</a></strong></div>
								
															<div class="header_contact_item"><span class="icon icon-mobile3"></span> <strong><a title="Click to call us" href="tel:(805) 781-1700">(805) 781-1700</a></strong></div>
													</div>
						
					<a target="_blank" href="http://instagram.com" class="header_soc_icon" title="Instagram">
										<span class="icon icon-instagram2"></span></a><a target="_blank" href="http://twitter.com" class="header_soc_icon" title="Twitter">
										<span class="icon icon-twitter3"></span></a><a target="_blank" href="http://facebook.com" class="header_soc_icon" title="Facebook">
										<span class="icon icon-facebook3"></span></a>					
					
					
				</div>	
			</div>	
		</div>