Fill in color of UTF-8 star

Question

How can I use CSS to fill in the background color of a UTF-8 star (☆)? I tried using this, but it only changes the border color:

.rating {
  color: #f70;
}

<p class="rating">&#9734;&#9734;&#9734;&#9734;</p>

Answer 1

You probably want to use a solid star, like http://www.fileformat.info/info/unicode/char/2605/index.htm

Here's an example: http://codepen.io/PaulBGD/pen/reXWvX

 #star {
   font-size: 128px;
   color: yellow;
   /* Some sort of border */
   text-shadow: -1px 0 black, 0 1px black, 1px 0 black, 0 -1px black;
 }

 <span id="star">&#9733;</span>

Answer 2

Why not use ★ or ★ UTF8 characters?

div {
  padding: 2px;
  background: cornflowerblue;
  border: 2px solid lightgray;
  border-radius: 2px;
  display: inline-block;
}
div span {
  position: relative;
}
div span:before {
  content: "\2605";
  position: absolute;
  transition:all 0.4s;
  color: gold;
}
div span:hover ~ span:before {
  content: "\2606";
  color: black;
}

<div>
  <span>&#9734;</span>
  <span>&#9734;</span>
  <span>&#9734;</span>
  <span>&#9734;</span>
  <span>&#9734;</span>
</div>

And by using pseudo elements, you can even add functionality such as a 5 star rating system.