That layer is a precomp. You need to open the "About Us" composition and find the pink solid/shape that comprises that element and change it's color. From looking at the flow chart there, it looks like you need to step into the composition "Shape 2" to get to that color. From your picture if you just click on "Shape 2"(above comp window) it should open that comp.
Johnny Cuevas, Editor
"I have not failed 700 times. I have succeeded in proving that those 700 ways will not work. When I have eliminated the ways that will not work, I will find the way that will work."
---THOMAS EDISON on inventing the light bulb.
Thanks for your response! I clicked on the " About Us" and I couldn't find the shape with the pink color.
As you can see from the screenshot ( please see attached link), There is only a text the user can edit and beneath that are "Text" and "Transform."