AT&T Brand Guidelines at a Glance 17 Primary vibrant color arc Secondary vibrant color arc Primary solid color arc Secondary solid color arc Primary vibrant color fill, white arc Secondary vibrant color fill, white arc Primary solid color fill, white arc Secondary solid color fill, white arc Primary vibrant color fill, transparent arc Secondary vibrant color fill, transparent arc Primary solid color fill, transparent arc Secondary solid color fill, transparent arc Arc Color Variations Arc colors are derived from the AT&T primary and secondary color palettes. Both solid and vibrant colors may be used with arcs. Do not use arc(s) that do not match the background color. Transparent and white arcs may also be used with solid or vibrant color backgrounds. White backgrounds may be used with solid or vibrant color arc(s).