Add a multicolor border example to default-config

default-config/config

@@ -237,7 +237,13 @@ IgnoreModifiers L25
 # Decor Styles
 Style * BorderWidth 5, HandleWidth 5, MWMButtons, FvwmBorder, FirmBorder
 Style * Colorset 1, HilightColorset 2
-Style * BorderColorset 3, HilightBorderColorset 4
+
+# BorderColorset and HilightBorderColorset take 8 positive colorsets
+# to specify the colorset for each edge and handle (corner). The order is:
+#   North NorthEast East SouthEast South SouthWest West NorthWest
+# This makes the edges and corners (handles) different colors.
+Style * BorderColorset 3 4 3 4 3 4 3 4
+Style * HilightBorderColorset 4 13 4 13 4 13 4 13
 
 # Disable Icons from appearing on desktop.
 # Comment this out or use Style * Icon to get the icons back.