jQuery Animate text-color on hover

Using the following code, trying to get the font color to animate on hover, similar to how I have the border-bottom-color animating. Changing the border-bottom-color works well but the font color just won't seem to change. A full example can be seen here: http://www.buenolisto.com/alma. Any help is greatly appreciated. I am also already calling the jQuery UI in with: https://ajax.googleapis.com/ajax/libs/jqueryui/1.8.18/jquery-ui.js

jQuery("li.social").hover(function() {
jQuery(this).find("img").stop(true, true).animate({
    'marginTop': "-=20px"
}, 'fast');
}, function() {
jQuery(this).find("img").stop(true, true).animate({
    'marginTop': "+=20px"
}, 'fast');
})
jQuery("li.reservas").hover(function() {
jQuery(this).find("img").stop(true, true).fadeOut({
    'marginTop': "-=30px"
}, 'slow');
}, function() {
jQuery(this).find("img").stop(true, true).fadeIn({
    'marginTop': "+=30px"
}, 'slow');
})
jQuery("ul.menu li").hover(function() {
jQuery(this).find("a").stop(true, true).animate({
    'borderBottomColor': '#2E9ECE',
    'color': '2E9ECE'
}, 'slow');
}, function() {
jQuery(this).find("a").stop(true, true).animate({
    'borderBottomColor': '#FFDF85',
    'color': 'FFDF85'
}, 'slow');
})

By looking at your code I can tell that you've forgotten # near css colors, so instead of this 'color': '2E9ECE' use this 'color': '#2E9ECE'. You may also want to work on your style, I have rewritten your last hover to something like this:

$('ul.menu li a').hover(
    function() {
        // do this on hover
        $(this).animate({
            'borderBottomColor': '#2E9ECE',
            'color': '#2E9ECE'
        }, 'slow');
    }, 
    function() {
        // do this on hover out
        $(this).animate({
            'borderBottomColor': '#FFDF85',
            'color': '#FEFEFE'
        }, 'slow');
    }
);

which, in my opinion, is more readable and shorter. Take a look at jQuery API hover and animate

UPDATE: I've verified, this code works (tested with newest versions of FireFox and Chrome):

<html>                                                                  
<head>                                                                  
<script type="text/javascript" src="https://ajax.googleapis.com/ajax/libs/jquery/1.7.2/jquery.min.js"></script>  
<script type="text/javascript" src="https://ajax.googleapis.com/ajax/libs/jqueryui/1.8.18/jquery-ui.min.js"></script> 
<script type="text/javascript">                                         
    $(function() {
        $("a").hover(
            function() {
                $(this).animate({ color: "#00ff00" }, 'slow');
            },function() {
                $(this).animate({ color: "#ff0000" }, 'slow');
        });
    });
</script>                                                               
</head>                                                                 
<body>                                                                  
    <a href="#">aaa</a><br />
    <a href="#">bbb</a><br />
</body>                                                                 
</html>