The invention provides a panel comprising a first light emitting area (1) for providing light of a first color and a second light emitting area (2) for providing light of a second color different from the first color, the first and second light emitting areas being separated from each other by a first spacing (3) along a first spacing axis (5) perpendicular to a normal of the panel, wherein the first spacing (3) is smaller than 5 micrometer. Preferably The Width (4) of the at least one of the light emitting areas is also smaller than 5 micrometer. As these spacings and/or dimensions approach the wavelength of light emitted by the light emitting areas, the boundaries between these arreas become blurred or even the areas become indistinguishable from each other due to mixing. A Panel of the invention can be advantageously used in lighting and or display devices, in particular those that magnify the light emitting areas towards their users, such as autostereoscopic displays having lenticular lens arrangments.