Another aspect of the present invention is directed to a non-transitory computer-readable recording medium recording a spectral characteristics prediction program of predicting spectral characteristics obtained by applying ink on a base material, wherein

the spectral characteristics prediction program causes a computer to execute:

a prediction target color setting step of setting, to a prediction target color, an ink color for which spectral characteristics of a maximum gradation value, spectral characteristics of a minimum gradation value, and spectral characteristics of at least one intermediate gradation value are obtained;

a first relational equation calculation step of obtaining a first relational equation that, with an intermediate gradation value for which spectral characteristics are obtained regarding the prediction target color being taken as a characteristics-acquired gradation value, represents a relationship between spectral characteristics of the maximum gradation value and spectral characteristics of the characteristics-acquired gradation value for each of a plurality of sample colors which are a plurality of ink colors each of which spectral characteristics of the maximum gradation value, spectral characteristics of the minimum gradation value, and spectral characteristics of at least one intermediate gradation value are obtained;

a first prediction step of, for each of the plurality of sample colors, obtaining prediction values of spectral characteristics of the characteristics-acquired gradation value for the prediction target color by applying the spectral characteristics of the maximum gradation value for the prediction target color to a corresponding first relational equation;