Change background color of "selected" with CSS

Change background color of "selected" with CSS

I'm trying to change the background color of the selected item but can't
get it work.
HTML:
<table class="select_payment_method_table">
<tr>
<td class="payment_details_cc">
<input id="visa1" type="radio" name="visa1" value="a1"
checked="checked"/>
<span class="visa_card_img">&nbsp;&nbsp;Credit Card (VISA /
MasterCard)</span>
<div class="clearfix"></div>
<div class="payment_img_main"><img src="image.png"></div>
</td>
</tr>
I tried this, but it doesn't work:
CSS:
.select input[checked]
{
background-color:white;
}