pricing and product discription

Hi, iv'e search and done just about everything to change my font color of the products pricing and discription and i just can't do it.
my css has this line > #productDescription, .shippingEstimatorWrapper {padding: 0.5em;}

a.productListing-heading {
color: #ffffff;
}
.alert {color: #FF0000; margin-left: 0.5em;}
i even tried adding this to the bottom> a.productListing-heading {
color: #ffffff;
} but it will not change, heres what it looks like

and heres the link http://altecart.com/healourworldstore/

can someone please help iv'e spent hours on this and i just can't figure it out
thanks

The css you are looking for is here:

body {margin: 0; font-family: verdana, arial, helvetica, sans-serif; font-size: 62.5%; color: #000000; margin: 10px 0px 50px 0px; color: #333; background: url(../images/bg_body.gif) repeat-x #6f9db8;}

Thanks RuFuS
that was it, I searched that page for hours and I don't think i would have ever thought it would be that.

Thanks again