A color picker controls a lighting system comprising one or more luminaries. A user interface comprises a display for displaying images when selected by a user via the user interface. The UI allows the user to select a region of a first image when displayed. Color selection information, which describes one or more color characteristics of one or more user-selected regions of at least the first image, is stored in a data store. When the user has selected a second image via the user interface, a region of the second image is automatically selected based on the color selection information. At least one luminaire of the lighting system is controlled to emit illumination rendering a color of the automatically selected region of the second image.