Firebase Docs Reference GoogleMobileAds Framework Reference GADSearchCallButtonColor enum GADSearchCallButtonColor : UInt Search ad call button color types. light < Light button color. Declaration Swift case light = 0 medium < Medium button color. Declaration Swift case medium = 1 dark < Dark button color. Declaration Swift case dark = 2 Except as otherwise noted, the content of this page is licensed under the Creative Commons Attribution 3.0 License, and code samples are licensed under the Apache 2.0 License. For details, see our Site Policies. Java is a registered trademark of Oracle and/or its affiliates. Last updated June 20, 2018.