https://github.com/ImageMagick/ImageMagick/issues/1065

diff --git a/MagickCore/gem.c b/MagickCore/gem.c
index 6db3e47b46d86076403fb315e22e5c6db5bd49b1..51f7b648324b7b5f8b924989191e242481d69423 100644 (file)
--- a/MagickCore/gem.c
+++ b/MagickCore/gem.c
@@ -1084,7 +1084,7 @@ MagickExport void ConvertRGBToHSL(const double red,const double green,
     QuantumScale*blue));
   c=max-min;
   *lightness=(max+min)/2.0;
-  if (c <= 0.0)
+  if (c < MagickEpsilon)
     {
       *hue=0.0;
       *saturation=0.0;