An image forming apparatus includes: a raster image processing unit configured to convert original image data into image data for image formation being of a raster image; an image forming unit configured to form an image on a paper sheet; a reading unit configured to generate read image data by reading the image formed on the paper sheet; a monitor setting unit configured to set a monitor setting color and an ideal value for the monitor setting color; a color tone monitoring unit configured to monitor a color tone difference between a value of the read image data in the monitor setting color and the ideal value; and a hardware processor configured to perform control to have color correction performed in the image forming unit, wherein the monitor setting color includes at least one of a primary color, a secondary color, a tertiary color, and a tertiary achromatic color.