To counter the increasing number of online threats for users' privacy and security, this paper explores the design of an ambient security indicator, in form of a standard keyboard illuminated in different colors, and equipped with additional buttons and vibration functionality. We present the results of a focus group study, which notably influenced the design, and discuss a prototypical implementation called MoodyBoard. ACM Classification Keywords H5.2 [Information Interfaces and Presentation (e.g. HCI)] User Interfaces