Can I change color in logo lower thirds?

I got this - https://videohive.net/item/simple-lower-thirds-for-premiere/21818470

But I can only change the colors in the Essential Panel Files but not in the 3 other included files with logo. prproj.

Is that not possible to do?

My auther has waiting time regarding respons, so I hope you guys can help me out bc im on a deadline and a bit new to this.

Thanks