Kyocera FS-C5100DN - Manual (Page 55)

Imaging
Images are represented by a series of evenly graduated tones, as in a
photograph. Color (CMYK) must be selected as the Color mode.
Print graphics as black
This option prints all color graphics and text with black, rather than
grayscale. This feature is implemented for CAD applications. Black & White
must be selected as the Color mode.
KX DRIVER 6-11