An image forming method and an apparatus therefor for forming a reproduced color image on a recording medium by repeating a process of forming on a latent image carrier an electrostatic latent image corresponding to a document image through an image exposure, depositing one of at least yellow, magenta and cyan toners on the electrostatic latent image, wherein a color which is read as a mixture of magenta and cyan is deposited as magenta or cyan according to the proportion of mixing of magenta and cyan in the mixed color.