You would need to modify your link_to() function - please post it here.
Note that what johanafm was saying is that you should NOT use the <font> element.
If you must color an element and let the link inherit it, rather than color the link itself (which is what you should do), use a <span> element instead of <font>.
So preferably use:
<a href="url" style="color:#e62b8c;">www.rainbowcode.mobi</a>
or failing that use
<span style="color:#e62b8c"><a href="url" style="color:inherit;">www.rainbowcode.mobi</a></span>
But the second won't work in IE as it doesn't understand 'inherit' - see this.