No, colors are stored in the CIELAB format.
However, ArcMap can define colors in the following five color models:
* RGB - red, green, blue
* CMYK - cyan, magenta, yellow, black
* HLS - hue, lightness, saturation
* Gray - gray shade ramp
* Name - ArcInfo color names
Most of the colors and symbols used by the styles included with ArcMap were created using the RGB color model. These do not translate to exact CMYK specifications. If necessary, you may have to reset the values and save the style again.