In an example, a method includes obtaining, at a processor, data indicative of a color of each of a first plurality of generated color samples, wherein the color samples are generated using an initial set of sample generation instructions. It may be determined, by a processor, if a spatial distribution of the colors of the generated color samples corresponds to a predetermined spatial distribution in a first color space. When the spatial distribution of the color of the generated color samples does not correspond to the predetermined spatial distribution, the method may further comprise determining, by a processor, a new sample generation instruction. The new sample generation instruction may replace an initial sample generation instruction in the initial set of sample generation instructions to determine a modified set of sample generation instructions. The new sample generation instruction may be generated to increase a correspondence of the spatial distribution of colors of a second plurality of color samples generated using the modified set of sample generation instructions to the predetermined spatial distribution.