<p>How can I make a style have all of the properties of the style defined in <code>.a .b .c</code> except for <code>background-color</code> (or some other property)? This does not seem to work.</p>

<pre><code>.a .b .c
{
    background-color: #0000FF;
    color: #ffffff;
    border: 1px solid #c0c0c0;
    margin-top: 4px;
    padding: 3px;
    text-align: center;
    font-weight: bold;
}

.a .b .c .d
{
   background-color: green;
}
</code></pre>

```
```
.a, .b, .c {color: #ffffff; border: 1px solid #c0c0c0; margin-top: 4px; padding: 3px; text-align: center; font-weight: bold; }

.a {background-color: red;}

.b {background-color: blue;}

.c {background-color: green;}
```
```