How JQuery can parse colors in text?

How to parse colors in text, if i type #40464f , i would like catch the color and apply it some CSS.

I know how to do that with added markup,

 <span data-color=""&开发者_运维问答gt; #40464f </span>

for example.

But i would like to know if its possible to do that automatically without the needed to add markups manually ?

Not really knowing what's asked, I'll just provide a way to match (HEX) colors within an HTML element.

Given HTML:

<p id="subject">
    Here is a color: #fff. Red is #ff0000 while #9ab57d is another color.
</p>

Use JS:

$(function() {
    var m = $('#subject').text().match(/#(?:[0-9a-f]{3}){1,2}/gi);
    // ['#fff', '#ff0000', '#9ab57d']

    $.each(m, function(i, v) {
        // `v` is each color...
    });
});

(Demo)

Update
Demo where the colors are actually used:

HTML:

<p id="subject">
    Here is a color: #fff. Red is #ff0000 while #9ab57d is another color.
</p>
<ol id="result"></ol>

JS:

$(function() {
    var m = $('#subject').text().match(/#(?:[0-9a-f]{3}){1,2}/gi),
        $result = $('#result');

    $.each(m, function(i, v) {
        $('<li />').text(v).css('background-color', v).appendTo($result);
    });
});

Update #2
Based on comments, replacing inline (demo):

HTML:

<p id="subject">
    Nous obtenons les 2 couleurs suivantes : #40464f &amp; #0f131a
</p>

JS:

$(function() {
    var $subject = $('#subject'),
        str = $subject.html();

    str = str.replace(/#(?:[0-9a-f]{3}){1,2}/gim, "<span style=\"background-color: $&;\">$&</span>");
    $subject.html(str);
});

Since I guess it's the text within the span you wish to check against I think that regexp matching is the way you have to go.

Here is a filter that allows regexp to be used for selecting elements.

http://james.padolsey.com/javascript/regex-selector-for-jquery/

Working Example on JSFiddle.net

<input /> <button>Change</button> <div></div>
<script>
$(function(){
  $('button').click(function(){

    $('div').css('background-color', $('input').val());  

  });

});
</script>

Or if it is the text color you wish to change just use .css('color', $('input').val())

Also, Note that your selectors should be better than mine!