1. A recording medium causing a computer to execute a color adjustment program used for an image quality adjustment comprising: assigning weights to adjustment amounts of colors included in an adjustment range in correspondence with a positional relationship with a target color in color space, and an adjustment amount of the target color, when information about the target color to be adjusted, the adjustment amount indicating an amount of the color adjustment made to the target color, and an adjustment range for deciding a range of colors to be adjusted along with the target color are input; calculating colors after the adjustment for the target color and the colors included in the adjustment range according to the weights; and drawing a three-dimensional region corresponding to the calculated colors in the color space.