The present invention relates to a color separation condition determination device, method and storage medium. A pixel of interest is extracted from multiple pixels, and the influence of visual effect applied to the pixel of interest is estimated on the basis of the positional relationship between the color of the pixel of interest and each color of at least one surrounding pixel. Also, the total usage of color materials in the pixel of interest is estimated. The color separation condition in the pixel of interest is determined on the basis of the respectively estimated influence of visual effect and total usage of color materials.