ConvertRGBToHWB   502 magick/colorspace.c           ConvertRGBToHWB(q->red,q->green,q->blue,&hue,&whiteness,&blackness);
ConvertRGBToHWB  3114 magick/enhance.c   ConvertRGBToHWB(*red,*green,*blue,&hue,&whiteness,&blackness);
ConvertRGBToHWB    49 magick/gem.h     ConvertRGBToHWB(const Quantum,const Quantum,const Quantum,double *,double *,
ConvertRGBToHWB   217 magick/methods.h #define ConvertRGBToHWB  PrependMagickMethod(ConvertRGBToHWB)