There is no grey/gray color; that's no color! :)

pep-email/draft-marques-pep-email.mkd

@@ -31,7 +31,7 @@ normative:
 informative:
 #  RFC6973:
 #   RFC5321:
-  Sieve: RFC5490
+#  Sieve: RFC5490
 #  RFC7258:
 #  RFC7942:
 #  RFC8280:

pep-rating/draft-marques-pep-rating.mkd

@@ -96,7 +96,7 @@ traffic-light:
 
 * green
 
-* no color (or gray)
+* no color
 
 Note: While "yellow" color is used in the context of traffic-lights
 (e.g., in North America), in other parts of the world (e.g., the UK)
@@ -203,7 +203,7 @@ The red color MUST only be used in three cases:
 
 ### No Color
 
-No specific (or a gray color) MUST be shown in the following cases:
+No color SHALL be shown in the following cases:
 
 * Rating code 0: A message can be rendered, but the encryption status
   is not clear, i.e., undefined