A profile adjustment method for causing a computer to execute a process for adjusting a to-be-adjusted profile representing a correspondence relationship between first coordinate values (CMYK in ) in a first device dependent color space (CS1) and device independent coordinate values (Lab S1 ) in a profile connection space PCS (CS3), the profile adjustment method comprising: acquiring (ST1), for an adjustment point corresponding to a to-be-adjusted color, an adjustment target (cmyk T )based on coordinates in a second device dependent color space (CS2); performing (ST2) optimization including, defining, as a first conversion table , a color conversion table used to convert the device independent coordinate values (Lab S1 ) into second coordinate values (cmyk p ) in the second device dependent color space, in an output profile representing a correspondence relationship between the device independent coordinate values and the second coordinate values, defining the device independent coordinate values at the adjustment point as to-be-adjusted PCS values, and executing an optimization process including setting initial values of provisional PCS values (Lab pS1 ) and further including searching for a solution which makes provisional color values (cmyk pp ) closer to the adjustment target relative to their initial values, thus acquiring an optimal solution (lab b ) for the device independent coordinate values corresponding to the adjustment target, wherein the values of provisional color values are acquired by a conversion, in accordance with the first conversion table, of provisional PCS values (Lab pS1 ) resulting from a change in the to-be-adjusted PCS values; and adjusting (ST3) the to-be-adjusted profile , based on the optimal solution for the device independent coordinate values. acquiring (ST1), for an adjustment point corresponding to a to-be-adjusted color, an adjustment target (cmyk T )based on coordinates in a second device dependent color space (CS2); performing (ST2) optimization including, defining, as a first conversion table , a color conversion table used to convert the device independent coordinate values (Lab S1 ) into second coordinate values (cmyk p ) in the second device dependent color space, in an output profile representing a correspondence relationship between the device independent coordinate values and the second coordinate values, defining the device independent coordinate values at the adjustment point as to-be-adjusted PCS values, and executing an optimization process including setting initial values of provisional PCS values (Lab pS1 ) and further including searching for a solution which makes provisional color values (cmyk pp ) closer to the adjustment target relative to their initial values, thus acquiring an optimal solution (lab b ) for the device independent coordinate values corresponding to the adjustment target, wherein the values of provisional color values are acquired by a conversion, in accordance with the first conversion table, of provisional PCS values (Lab pS1 ) resulting from a change in the to-be-adjusted PCS values; and adjusting (ST3) the to-be-adjusted profile , based on the optimal solution for the device independent coordinate values. <EOS>