This is the front and back of the same shirt:
I started off with a black shirt, then bleached out the top front which you now see was kind of a burgundy-grey. After rinsing it out I dyed the whole thing with a red RIT dye, rinsed again (red dye's a pain), then bleached around the star in the back. I dyed the shirt yellow, since I wanted more of a gold field around the star. What I got was kind of subtle, but if you compare between the area around the star and say the gryphon on the front, they're different colors. Part of that was from not really bleaching anything totally white. Then I bleached the griffin and the crescent, rinsed some more, and voilla! The colors are a bit more vibrant in person, but it's still kind of subdued.