Image.Color and Colors.parse_color parses HSV differently
Imported from http://bugzilla.roxen.com/bugzilla/show_bug.cgi?id=984
Reported by Martin Nilsson, IDA nilsson@pike.ida.liu.se
> Colors.parse_color("@128,50,50");
Result: ({ /* 3 elements */
49,
79,
253
})
> Image.Color("@128,50,50")->rgb();
Result: ({ /* 3 elements */
63,
127,
72
})