What do the Colors on the Achievement bars represent?

I think this is a great idea, showing not only the points and achievements, but also how common they are. I'm confused about the different colors on the bars though. The dark orange seems to represent how many achievements I have, but does anyone know what the sort of lighter yellow and dark red bars for?

It shows the average amongst GB members. So in dead space, the light orange is how much achievements you've done, and the dark orange is the average amongst GB members on completing dead space. And for CoD4, the dark red represents the average when your score is below average.

ok. so in Dead Space I've done a little bit more than the average in achievements and points?

cool. thanks for confirming that I'm reading the graph the right way.