The wide availability and high efficiency of coloured LEDs proves to be a decisive advantage when building RGB colour-mixing systems. When it comes to the control of such luminaires, market standards such as DALI need to be adapted such that LED lighting can then be seamlessly integrated into holistic architectural scenarios. The "ERCO Light Studio" software component of our Light System DALI lighting control system offers tools that are more user-friendly than ever before especially for colour mixing.