AT&T Brand Guidelines at a Glance 6 Signature Colors For greater flexibility, we have created a suite of signatures to meet various graphic needs. Refer to the Downloads section of the Brand Center. The signature uses two variations of the globe symbol: gradient and solid. The gradient signature is preferred and should be used whenever possible. Printing and other reproduction methods may require the use of one-color solid variations. While the gradient signature is preferred, legibility should be your top priority. The signatures shown here are the signatures with tagline in the horizontal configuration. The same color variations apply to all signature configurations. Two-color reverse gradient signature One-color reverse blue gradient signature Two-color gradient signature Four-color process reverse gradient signature One-color reverse black gradient signature Four-color process gradient signature One-color solid black signature Two-color solid signature One-color blue gradient signature One-color reverse black solid signature One-color solid blue signature One-color black gradient signature