Going on the post that had you use a permanent marker over the LED that the trackball has, I followed the instructions to dissasemble the Pearl on the forums, and did the same to my keypad LED's.
Its hard to get a photo that correctly renders the colors, but I would say this is pretty close. Kinda cool if you want to be a bit different from the rest of the pearls, I also did the red trackball LED mod to my phone. Let me know what you think! It looks a bit pink in the photo, in person its more red.