creo4 config.pro option documentation for: IGES_IN_DWG_COLOR 
iges_in_dwg_color
yes
, no
*
Determines the import of RGB information in the IGES files. The color-definition entities in the IGES files are either imported or ignored. This configuration option is available as Import User Colors
in the Import IGES
dialog box.
yes
- Imports RGB information. The color-definition entities in the IGES files are imported to the drawings as user-defined colors. All entities using the color-definition entities are set to use the user-defined colors.
no
- Ignores the color-definition entities in the IGES files. All entities referencing these colors are set to use the assigned color in the color-definition entity.