Dip several black tea bags in hot or boiling water and let them steep for approximately five minutes.
Grip one of the tea bags and dab it against the top of your lampshade, spreading the color around on the fabric. The color may appear lighter in some places and darker in others; a uniform color isn't necessary.
Repeat the process by grabbing a new tea bag from the water once the old tea bag tears. If any tea grounds fall onto the fabric, wait until the shade is dry and then wipe it with a clean cloth.