A control apparatus includes a controller. The controller obtains a job which is executed by a print apparatus and which is corresponded to document image data. The controller obtains read image data of a color sample corresponding to the document image data from a scanner. The controller determines whether correction of the scanner and/or the print apparatus is necessary based on the read image data. The controller corrects the scanner and/or the print apparatus based on a result of determination. The controller generates a color conversion parameter regarding a color conversion of the document image data based on a profile corresponding to the scanner and/or the print apparatus after correction, the document image data, and the read image data.