Changing The Checkout Heading's Font Colour (CSS)

Hi Guys,

Im editing my stylesheet, and have set most of the stuff I need. Im a little stuck on the checkout though.

I have a black background and have managed to set the font colours to white correctly so its readable.

The only thing im stuck on is the header names on each of the checkout option steps, its still showing as black so unreadable. ("New Customer", "Your Personal Details" ... etc heading titles). Then content itself is showing as white now which is fine.

These are my current settings :-

Any idea what im missing?

/* checkout */
.checkout-heading {
background: #4F4F4F;
border: 1px solid #FFFFFF;
padding: 8px;
font-weight: bold;
color: #FFF;
font-size: 13px;
color: #FFF;
margin-bottom: 15px;
}
.checkout-heading a {
color: #FFFFFF;
float: right;
margin-top: 1px;
font-weight: normal;
text-decoration: none;

}

Thanks