I just had a chance to look at your page above. I see the "Remember Me" text is white, as you mention. To fix that (and make all text in the SCLogin module another color), simply add the following to your stylesheet:
.sclogin {
color: black;
}
On your site, the template is setting all text to white, which is valid, but many extensions assume a dark on light pattern.. so you may encounter this with other extensions.
I hope that helps,
Alex