diff --git a/AppKit/Themes/Aristo/Resources/window-standard-divider-center.png b/AppKit/Themes/Aristo/Resources/window-standard-divider-center.png
new file mode 100644
index 000000000..6d6c8a1db
Binary files /dev/null and b/AppKit/Themes/Aristo/Resources/window-standard-divider-center.png differ
diff --git a/AppKit/Themes/Aristo/Resources/window-standard-divider-left.png b/AppKit/Themes/Aristo/Resources/window-standard-divider-left.png
new file mode 100644
index 000000000..a4a673ef3
Binary files /dev/null and b/AppKit/Themes/Aristo/Resources/window-standard-divider-left.png differ
diff --git a/AppKit/Themes/Aristo/Resources/window-standard-divider-right.png b/AppKit/Themes/Aristo/Resources/window-standard-divider-right.png
new file mode 100644
index 000000000..5089655a0
Binary files /dev/null and b/AppKit/Themes/Aristo/Resources/window-standard-divider-right.png differ
diff --git a/AppKit/Themes/Aristo/ThemeDescriptors.j b/AppKit/Themes/Aristo/ThemeDescriptors.j
index 203073b1f..d6622c6ac 100755
--- a/AppKit/Themes/Aristo/ThemeDescriptors.j
+++ b/AppKit/Themes/Aristo/ThemeDescriptors.j
@@ -2440,6 +2440,14 @@ var themedButtonValues = nil,
             [@"window-standard-bottom-right.png", 2.0, 2.0]
         ]),
 
+        dividerColor = PatternColor(
+            "window-standard-divider{position}.png",
+            {
+                width: 1.0,
+                height: 1.0,
+                orientation: PatternIsHorizontal
+            }),
+
         closeButtonImage =                  PatternImage(@"window-standard-close-button.png", 16, 16),
         closeButtonImageHighlighted =       PatternImage(@"window-standard-button-highlighted.png",16, 16),
         unsavedButtonImage =                PatternImage(@"window-standard-button-unsaved.png",16, 16),
@@ -2467,7 +2475,7 @@ var themedButtonValues = nil,
             [@"title-vertical-alignment",   CPCenterVerticalTextAlignment],
             [@"title-bar-height",           31],
 
-            [@"divider-color",              [CPColor colorWithHexString:@"979797"]],
+            [@"divider-color",              dividerColor],
             [@"body-color",                 bezelColor],
             [@"title-bar-height",           31],