[Inkscape-user] Gradient from black to blue

Hi all,

I'm having a problem with gradients. It seems I'm only able to create gradients from a color to white. I wish to create from black to blue. How can I do this? Is there any reference on gradients on the web? The tutorials don't seem to go through this and everything else about gradients seem to create <color> => white gradients.

Any help is appreciated, Cheers,