We have recently developed a novel color print film “REALA” with excellent color reproduction quality. This has been realized by incorporating the fourth light sensitive layer in addition to the conventional red-, green-, and blue-sensitive layers. The fourth layer (CL layer) is sensitive to cyan color (ca. 470-540 nm) and it releases development inhibitors in proportion to the degree of light exposure in order to give a due inter-image effect to the red-sensitive layer thus approximately realizing the negative lobe of color matching functions. In addition, the spectral sensitivities and interimage effects for the conventional three layers have also been optimally designed based upon the color reproduction theory. As a result of these optimization, color mismatches for yellow green colors, certain fabric colors, or deep purple to blue flower colors, which are rather difficult to photograph exactly in previous color print films, have been remarkably improved. It should be also pointed out that the color mismatches caused by photographing under fluorescent lamps are also dramatically relieved thus reproducing all object colors most naturally.