That means the main light can glow in one colour whilst a multi-coloured hue is then created on your wall via something Philips calls ColourCast gradient projection technology. It might sound like ...

Kramer, Mark R., Thijs Geradts, and Bhanuteja Nadella. "Philips Lighting: Light-as-a-Service." Harvard Business School Case 719-446, March 2019. (Revised May 2019.) ...