1. A lighting device for illuminating an object, the lighting device comprising:a light source arrangement comprising multiple light sources of different colors configured to emit a respective light beam, wherein a total light emitted by said light source arrangement produces a white light beam;
a contrast producing element comprising an optically transmissive portion and a second portion being at least partly optically blocking, said contrast producing element being arranged to receive white light from said light source arrangement, and to create shadows on the object;
a control unit configured to control said light source arrangement to modulate a spatial light spectral distribution of the total light emitted by said light source arrangement at said contrast producing element; and
a selector for switching said lighting device between a first mode in which said control unit is inactive and said lighting device emits white light, and a second mode in which said control unit is active, and
wherein in the second mode said lighting device is arranged to create dynamically changing color shadows on the object.