1. A method for adjusting the color of images, applied to a color display having a color gamut, the method comprising: obtaining an original hue-saturation-value (HSV) color coordinate from an original image signal; converting the original HSV color coordinate into an adjusted HSV color coordinate according to a color adjusting data; converting the adjusted HSV color coordinate into a corrected HSV color coordinate; and generating an output image signal according to the corrected HSV color coordinate.