ArcMap has the ability to define vector symbols in CMYK color, and preserve that color on export to a process CMYK graphics file. Export of CMYK colors is supported in PDF, EPS, Illustrator, and SVG export formats.
Click the 'More Colors' button to access the full color selector dialog box.
If the color selector displays the RGB sliders, the color was previously defined as an RGB color.
The ArcMap color selector shown editing a color marked as RGB.
The ArcMap color selector shown editing a color marked as CMYK.
Since the color selector was in CMYK mode when OK was clicked, the color is now tagged as CMYK. When this symbol is exported to a vector graphics format with the exporter's Destination Colorspace set to 'CMYK', the CMYK numbers will be preserved in the output file.
Set the Destination Colorspace to CMYK.
CMYK output is supported with the following limitations:
· ArcMap raster layers always render internally as RGB colors. This means that even when a raster is defined with the color selector in CMYK mode, it does not internally get marked as CMYK color, and the raster layers stores only the RGB equivalent. On export to a CMYK graphics file, the stored RGB information is converted from RGB back to CMYK, but the CMYK values do not match the user defined CMYK values selected during set up of the raster layer properties.
· Vector layers with transparency render as raster. Thus, any transparent vector layer using CMYK colors are not preserved CMYK numbers during output to a CMYK export file.
· Picture Marker symbols sourced from a vector EMF file always use the colors defined in the EMF. Since the EMF file format does not support CMYK colors, it is not possible to define EMF Picture Marker symbols as CMYK. Instead, use a Simple Marker Symbol or a Character Marker Symbol, and follow the procedure documented above to define the symbol colors in CMYK.