An image forming apparatus includes a storage unit to store a color conversion table, a user interface unit to receive a color revision initiation command, an image forming unit to print a color chart generated based on the color conversion table if the color revision initiation command is received, the color chart having a plurality of CMYK mixed colors having at least one of brightness and chroma changed, a scan unit to scan the printed color chart, and a change unit to revise the color conversion table using the scanned color chart.