Color Effect doesn't work!

So I was using the "Color Effect" block to change the color of a drawing, say like a background image or something to change its hue. However it doesn't work! My drawing always goes back to the same color! Can someone fix it?

If there are several scripts one of the scripts may be interfering with the block. Would you mind sharing the project?

Just checked, the color effect totally works for me.

Can you show us the drawing plz.

Oh, your costume seem all in black... The color effect doesen't affect black, white and transparent...