In a nutshell:

    #define COLOR_LIST \
      X( RED    )      \
      X( GREEN  )      \
      X( BLUE   )      \
      X( PURPLE )

    enum Color
    {
    #define X(code) code,
      COLOR_LIST
    #undef X
    };

    static const char* colorNames[] =
    {
    #define X(code) #code,
      COLOR_LIST
    #undef X
    };

    // --- color.def
    X( RED,    "Red",   0xFF0000 )
    X( GREEN,  "Green", 0x00FF00 )
    X( BLUE,   "Blue",  0x0000FF )

    // --- color.h
    enum Color
    {
    #define X(code,name,mask) code,
    #  include "color.def"
    #endif
    };

    static const char* colorNames[] =
    {
    #define X(code,name,mask) name,
    #  include "color.def"
    #undef X
    };

    static unsigned int colorMasks[] =
    {
    #define X(code,name,mask) mask,
    #  include "color.def"
    #undef X
    };

  #undef X