A device link profile adjustment method of a computer carrying out a process of adjusting a device link table in a device link profile expressing a correspondence relationship between a first coordinate value (CMYK in) of a first device-dependent color space and a second coordinate value (cmyk p) of a second device-dependent color space, the method comprising: accepting an adjustment target of an adjustment point expressing a spot color to be adjusted, using a coordinate in a profile connection space PCS as a reference; and adjusting the device link table based on the adjustment target and a color conversion table including a device-independent coordinate value of the profile connection space in an original profile used to create the device link table, wherein the original profile includes an output profile expressing a correspondence relationship between the second coordinate value and the device-independent coordinate value, and the color conversion table includes a first conversion table used to convert from the second coordinate value to the device-independent coordinate value; and wherein the adjusting includes: converting an adjustment target color value (cmyk p) that is the second coordinate value at the adjustment point into an adjustment target PCS value (Lab S2) that is the device-independent coordinate value in accordance with the first conversion table; assuming a value obtained by adding a relative value (ΔLab T-P) of the adjustment target using the coordinate of the profile connection space as a reference to the adjustment target PCS value (Lab s2) is a target PCS value, assuming a value added to the adjustment target color value (cmyk p) is an adjustment color value (Δcmyk), and obtaining an optimal solution (Δcmyk b) of the adjustment color value (Δcmyk) by carrying out an optimization process including an element that brings a provisional PCS value (Lab S3) obtained by converting, in accordance with the first conversion table, a provisional color value (cmykpp) that is the result of adding the adjustment color value (Δcmyk) to the adjustment target color value (cmykp) closer to the target PCS value (Lab ST); and adjusting the device link table based on the optimal solution (Δcmyk b) of the adjustment color value. accepting an adjustment target of an adjustment point expressing a spot color to be adjusted, using a coordinate in a profile connection space PCS as a reference; and adjusting the device link table based on the adjustment target and a color conversion table including a device-independent coordinate value of the profile connection space in an original profile used to create the device link table, wherein the original profile includes an output profile expressing a correspondence relationship between the second coordinate value and the device-independent coordinate value, and the color conversion table includes a first conversion table used to convert from the second coordinate value to the device-independent coordinate value; and wherein the adjusting includes: converting an adjustment target color value (cmyk p) that is the second coordinate value at the adjustment point into an adjustment target PCS value (Lab S2) that is the device-independent coordinate value in accordance with the first conversion table; assuming a value obtained by adding a relative value (ΔLab T-P) of the adjustment target using the coordinate of the profile connection space as a reference to the adjustment target PCS value (Lab s2) is a target PCS value, assuming a value added to the adjustment target color value (cmyk p) is an adjustment color value (Δcmyk), and obtaining an optimal solution (Δcmyk b) of the adjustment color value (Δcmyk) by carrying out an optimization process including an element that brings a provisional PCS value (Lab S3) obtained by converting, in accordance with the first conversion table, a provisional color value (cmykpp) that is the result of adding the adjustment color value (Δcmyk) to the adjustment target color value (cmykp) closer to the target PCS value (Lab ST); and adjusting the device link table based on the optimal solution (Δcmyk b) of the adjustment color value. converting an adjustment target color value (cmyk p) that is the second coordinate value at the adjustment point into an adjustment target PCS value (Lab S2) that is the device-independent coordinate value in accordance with the first conversion table; assuming a value obtained by adding a relative value (ΔLab T-P) of the adjustment target using the coordinate of the profile connection space as a reference to the adjustment target PCS value (Lab s2) is a target PCS value, assuming a value added to the adjustment target color value (cmyk p) is an adjustment color value (Δcmyk), and obtaining an optimal solution (Δcmyk b) of the adjustment color value (Δcmyk) by carrying out an optimization process including an element that brings a provisional PCS value (Lab S3) obtained by converting, in accordance with the first conversion table, a provisional color value (cmykpp) that is the result of adding the adjustment color value (Δcmyk) to the adjustment target color value (cmykp) closer to the target PCS value (Lab ST); and adjusting the device link table based on the optimal solution (Δcmyk b) of the adjustment color value.