Hi, Can anybody help me understand the concept of color intensity in the following : I have 2 rectangles of black color. I want to give an intensity of 100 to one of them and 300 to the other one. BUt i want them to remain in the grayscale (they should not be colored but should remain between white and black). Is there a scale which matlab uses for such thing ? Is 256 taken as black or some other value ? I am quiet confused.