image formatting

I'm trying to use this image as an eye with shadow area around outer portion. When I try to copy this Jpeg into AI and trace the image i get solid oval...no granularity. I originally created this in AI using the Sprayer Tool with spray paint pattern. It appears to be in layers (some gray, some black) I tried to group the image to flatten it but I can't get the colors to change for the entire image.

I need to be able to change the color of the entire image to a single color. When I insert this eye into my other drawing (to represent the eye) and try to change the color the rest of the image...including text will change color...either stroke or fill but not this eye. I've tried the user manual but get lost. Any suggestions? thanks