A color conversion table adjustment method for adjusting a color conversion table representing a correspondence relationship between coordinate values of an input color space and an output color space for a plurality of grid points by a computer, by using the plurality of reference grid points being referenced when output coordinate values are interpolated, adjustment points receiving step capable of acceptance of a plurality of adjustment points in the interpolation range that dividing the input color space, acquiring set adjustment amounts representing amounts of adjustment for the accepted adjustment points, determining, by using the set adjustment amounts for each of the plurality of adjustment points, grid point adjustment amounts representing amounts of adjustment for the plurality of reference grid points in a case where the plurality of adjustment points are accepted within the interpolation range, and adjusting the color conversion table, based on the grid point adjustment amounts.