Changing color lines without changing swatch

I made a long animation using black ink and now I need to change the color to blue. The thing is there’s another animation in another layer that also uses the same black swatch. That other animation has nothing wrong with it so I don’t need to change it.
But if I change the black swatch (in order to fix the 1st one) the 2nd one changes too!

Is there any way to change the color of a drawing without completely changing it’s swatch? (like in Illustrator?)

You can add “Colour-Override” node to the node view.
I give you cut the figure with the marking step

screenshot
http://oi60.tinypic.com/ri90go.jpg

—Loong