Change color when hover a font awesome icon?

Question

Base in the Font Awesome documentation I create this icon:

  
  &         


        

Answer 1

if you want to change only the colour of the flag on hover use this:

http://jsfiddle.net/uvamhedx/

.fa-flag:hover {
    color: red;
}

<link href="https://maxcdn.bootstrapcdn.com/font-awesome/4.7.0/css/font-awesome.min.css" rel="stylesheet"/>

<i class="fa fa-flag fa-3x"></i>

Answer 2

use - !important - to override default black

.fa-heart:hover{
   color:red !important;
}
.fa-heart-o:hover{
   color:red !important;
}

<link rel="stylesheet" href="https://maxcdn.bootstrapcdn.com/font-awesome/4.7.0/css/font-awesome.min.css">

<i class="fa fa-heart fa-2x"></i>
<i class="fa fa-heart-o fa-2x"></i>