diff --git a/extra/colors/xyy/xyy-docs.factor b/extra/colors/xyy/xyy-docs.factor
index 20238a42ef..f99eb97d54 100644
--- a/extra/colors/xyy/xyy-docs.factor
+++ b/extra/colors/xyy/xyy-docs.factor
@@ -4,7 +4,7 @@ IN: colors.xyy
 HELP: xyYa
 { $class-description "The class of CIE xyY colors with an alpha channel." } ;
 
-ARTICLE: "colors.xyy" "xyY colors"
+ARTICLE: "colors.xyy" "CIE xyY colors"
 "The " { $vocab-link "colors.xyy" } " vocabulary implements CIE xyY colors, together with an alpha channel."
 { $subsections
     xyYa
diff --git a/extra/colors/xyz/xyz-docs.factor b/extra/colors/xyz/xyz-docs.factor
index b08eac1e09..15659be844 100644
--- a/extra/colors/xyz/xyz-docs.factor
+++ b/extra/colors/xyz/xyz-docs.factor
@@ -4,7 +4,7 @@ IN: colors.xyz
 HELP: xyza
 { $class-description "The class of CIE XYZ colors with an alpha channel." } ;
 
-ARTICLE: "colors.xyz" "XYZ colors"
+ARTICLE: "colors.xyz" "CIE XYZ colors"
 "The " { $vocab-link "colors.xyz" } " vocabulary implements CIE XYZ colors, together with an alpha channel."
 { $subsections
     xyza