diff --git a/demo/src/main/scripts/gron.nanorc b/demo/src/main/scripts/gron.nanorc
index 390559ad9..caecaa9e5 100644
--- a/demo/src/main/scripts/gron.nanorc
+++ b/demo/src/main/scripts/gron.nanorc
@@ -6,6 +6,7 @@ color yellow ""(\\.|[^"])*"|'(\\.|[^'])*'|[a-zA-Z]+[a-zA-Z0-9]*"
 color cyan  "\<null\>"
 color brightcyan "\<(true|false)\>"
 color brightyellow "\"(\\"|[^"])*\"\s*:"  "'(\'|[^'])*'\s*:" "(\[|,)\s*[a-zA-Z0-9]*\s*:"
+color white "(:|\[|,)"
 color magenta   "\\u[0-9a-fA-F]{4}|\\[bfnrt'"/\\]"
 color ,green "[[:space:]]+$"
 color ,red "	+ +| +	+"
\ No newline at end of file