I'm using the gradient extra color to create a small divider line between text.  The gradient goes from red to white.  Sometimes that line is used over a white background and it looks just fine.  Other times that line is used over a blue or grey background and you can see that there is white in the gradient.  Is there a way to force the white to actually be transparent in this case or have a gradient that fades from one color to none at all.  If you visit the link I attached you'll see an example half way down the page.  Thanks.