AT&T Brand Guidelines at a Glance 15 Arc System We use portions of the globe symbol (called arcs) as a design element. Arcs help give a unified look and feel to all of our applications. The arc often acts as a clear-space area, keeping the AT&T signature free of other graphic elements while providing contrast from any background imagery. The visual below shows how the arcs were constructed. Never create your own arcs. The templates provided for download on the AT&T Brand Center come with arcs available for use in all types of applications. AT&T color palettes are embedded into each arc template file.