Must support -mattecolor option for IMv6 compatibility.
diff --git a/coders/json.c b/coders/json.c
index 662138d..9ac1252 100644
--- a/coders/json.c
+++ b/coders/json.c
@@ -1205,8 +1205,8 @@
" \"x\": %.20g,\n \"y\": %.20g\n },\n",
(double) image->extract_info.width,(double) image->extract_info.height,
(double) image->extract_info.x,(double) image->extract_info.y);
- GetColorTuple(&image->alpha_color,MagickTrue,color);
- (void) FormatLocaleFile(file," \"alphaColor\": \"%s\",\n",color);
+ GetColorTuple(&image->matte_color,MagickTrue,color);
+ (void) FormatLocaleFile(file," \"matteColor\": \"%s\",\n",color);
GetColorTuple(&image->background_color,MagickTrue,color);
(void) FormatLocaleFile(file," \"backgroundColor\": \"%s\",\n",color);
GetColorTuple(&image->border_color,MagickTrue,color);