There are provided an image processing apparatus and method thereof which, in a case where drawing data represented by an RGB space satisfies a predetermined condition, perform a compensation of color that converts a pixel value of image data in an MCYK color space into a predetermined value, and in accordance with information for designating whether or not to use color conversion for each respective object included in the drawing commands, select whether to perform normal conversion processing for converting the drawing data of the RGB color space into a pixel value in the MCYK space or to perform color compensation conversion processing, and convert the pixel data from RGB to MCYK.