gdImageColorClosestHWB  125 ext/gd/gd.c    int gdImageColorClosestHWB(gdImagePtr im, int r, int g, int b);
gdImageColorClosestHWB 3177 ext/gd/gd.c    	RETURN_LONG(gdImageColorClosestHWB(im, Z_LVAL_PP(red), Z_LVAL_PP(green), Z_LVAL_PP(blue)));
gdImageColorClosestHWB  390 ext/gd/libgd/gd.h int gdImageColorClosestHWB(gdImagePtr im, int r, int g, int b);