Thinka has been supporting color lights for a while, with the latest version 4.3.1046, support has been expanded to include KNX actuators with separate dimmer channels for all colors.
For configuration, select the “Lightbulb (Color)” service type and “Separate color channels” for the Color Datapoint Type parameter. Each color channel needs to be configured with set and listen addresses for the switch and brightness group objects. The white channel is optional.