1. Open Photoshop. Create a new file
and make a new layer. Keep it selected.
2. Open swatches from Window > Swatches
3. Choose Pure Red as foreground color. (1st col 5th
row)
4. Select Rectangular Marquee tool and make rectangle
on the new layer.
5. Fill the Pure Red color using Alt + Del. Deselect
with Ctrl + D

6. Make another layer. Keep it selected.
7. Select Rectangular Marquee Tool and draw rectangle
on the new layer such that it will overlap some portion of the bottom
rectangle.
8. Choose Dark Red (just below Pure Red) as foreground
color and fill the rectangle. Deselect with Crtl + D.

9. Make another rectangle on the same layer besides
the Dark red rectangle. This layer should also overlap some portion
of the Pure Red rectangle.
10. Choose Light Red (just above Pure Red) this time
and fill the rectangle. Deselect with Ctrl + D

11. Change the mode of the Top most layer to Darken.

12. You will notice that the Dark Red remained unchanged
and the overlapped portion of the Light Red rectangle is dominated
by the Pure Red.

|