1. An imaging apparatus comprising: an imaging unit configured to capture an object image; a smoothing unit configured to reduce a dynamic range of luminance of an image signal generated based on the object image captured by the imaging unit; and a color conversion unit configured to perform a color conversion on the image signal whose dynamic range of luminance is reduced by the smoothing unit in accordance with a color specified by a user operation before the dynamic range of luminance is reduced, wherein a color point to be converted is specified from a plurality of color points in a predetermined color space by the user operation, and the color conversion unit converts the specified color point into another color point included in the plurality of color points in the predetermined color space.