Color conversion apparatus, non-transitory computer readable medium, and image forming apparatus

A non-transitory computer readable medium storing a program causing a computer to execute a process for color conversion, the process comprising:

• obtaining information indicating a positional relationship between basic-color toners of basic colors and a special-color toner of a special color among special-color toners of special colors regarding vertical layering on an image formed in an image forming apparatus using the basic-color toners and the special-color toner;
• defining a spot color by a combination of the basic colors and the special color;
• and
• outputting, in accordance with the positional relationship indicated by the information, basic-color conversion tables used to convert the spot color to the basic colors that are included in the combination and a special-color conversion table used to convert the spot color to the special color that is included in the combination.

An image forming apparatus comprising:

• first image forming units that form toner images using basic-color toners of basic colors;
• second image forming units that form toner images using special-color toners of special colors;
• a transfer unit that layers and transfers, to a recording medium, the toner images formed by the first image forming units and the toner images formed by the second image forming units;
• an obtaining unit that obtains information indicating a positional relationship between the basic-color toners and a special-color toner of a special color among the special-color toners regarding vertical layering on an image formed using the basic-color toners and the special-color toner;
• a defining unit that defines a spot color by a combination of the basic colors and the special color;
• and
• an output unit that outputs, in accordance with the positional relationship indicated by the information, basic-color conversion tables used to convert the spot color to the basic colors that are included in the combination and a special-color conversion table used to convert the spot color to the special color that is included in the combination.