An illumination system (1, 100, 200, 300) for providing an optically widened perception comprises a reflector unit (6, 206, 306) comprising a reflective surface (8A) and a luminous layer (10, 210, 310) for homogenously emitting diffuse light at a first color, the luminous layer (10, 210, 310) extending in front of the reflective surface (8A) and comprising a visible front area section (10A, 210A, 310A) of the reflector unit (6, 206, 306), which extends up to a first boundary (12A, 310A) and through which the diffuse light is emitted. The illumination system (1, 100, 200, 300) comprises further a light projector (2, 202, 302) configured to generate a light beam (3, 203, 303) adapted in size for comprehensively illuminating the visible front area section (10A, 210A, 310A) such that at least a portion of the light beam (3, 203, 303) passes through the luminous layer (10, 210, 310) before and after being reflected by the reflective surface (8A), thereby forming an illuminating light beam (3A) at a second color associated with a direct light correlated color temperature, and wherein the first color and the second color are separated in color space. The illumination system (1, 100, 200, 300) is further configured such that a perceivable light emission from a frame-like area next to and surrounding the visible front area (10A, 210A, 310A) section is essentially independent from the light beam (3, 203, 303) of the light projector (2, 202, 302).