We propose a method to generate a display with enhanced color appearance by projecting monochromatic 365 nm ultraviolet (UV) light onto an optimized pattern surface containing red, green, and blue fluorescent pigments. Our method is based on the Paxel framework proposed by Pjanic and Grundhöfer [1] describing the color formulation process when projecting spatially varying illumination onto a printed surface containing pigments with spatially varying properties, in our case fluorescent emission. In this article, we extend this approach by optimizing the spatial arrangement and surface ratios of the used red, green, and blue transparent fluorescent pigments within the patterns. These ratios are optimized in order to obtain a color gamut with maximized volume. Furthermore, we propose a novel setup where the fluorescent inks are printed onto a transparent film which is then placed onto a black, light-absorbing material. This projection setup, consisting of an emissive and a black absorbing layer, enables us to produce high-contrast imagery even if a high amount of ambient light is present. Finally, to reduce the visually unpleasant appearance of the printed patterns, we introduce an alternative hexagon-shaped pattern structure.