A head-up display system for a vehicle facilitating the use of night vision goggles for a person in the vehicle during night vision conditions. The system includes a light source for providing light to an image source. The image source is arranged to project an image on a semi-transparent combiner mirror. The combiner mirror is arranged to superimpose the projected image onto a view of the environment in front of the vehicle by transmitting light rays from the environment and at the same time reflecting the projected image towards the eyes of an observer. The system includes a first and a second light source for alternatively providing light to the image source. The first light source is arranged to emit light of a first color to be used during daylight conditions, and the second light source is arranged to emit light of a second color to be used during night vision conditions, wherein the second color is mainly yellow or mainly orange.