diff --git a/configs/sim/nx/defconfig b/configs/sim/nx/defconfig
index c2c378bceb8..4717caac980 100644
--- a/configs/sim/nx/defconfig
+++ b/configs/sim/nx/defconfig
@@ -434,10 +434,18 @@ CONFIG_EXAMPLES_NSH_FATMOUNTPT=/tmp
 #
 # CONFIG_EXAMPLES_NX_VPLANE -- The plane to select from the frame-
 #   buffer driver for use in the test.  Default: 0
-# CONFIG_EXAMPLES_NX_BGCOLOR -- The color of the background.  Default: ' '.
-# CONFIG_EXAMPLES_NX_COLOR1 -- The color of window 1. Default: '1'
-# CONFIG_EXAMPLES_NX_COLOR2 -- The color of window 2. Default: '2'
-# CONFIG_EXAMPLES_NX_TBCOLOR -- The color ofthe toolbar. Default: '3'
+# CONFIG_EXAMPLES_NX_BGCOLOR -- The color of the background.  Default depends on
+#   CONFIG_EXAMPLES_NX_BPP.
+# CONFIG_EXAMPLES_NX_COLOR1 -- The color of window 1. Default depends on
+#   CONFIG_EXAMPLES_NX_BPP.
+# CONFIG_EXAMPLES_NX_COLOR2 -- The color of window 2. Default depends on
+#   CONFIG_EXAMPLES_NX_BPP.
+# CONFIG_EXAMPLES_NX_TBCOLOR -- The color of the toolbar. Default depends on
+#   CONFIG_EXAMPLES_NX_BPP.
+# CONFIG_EXAMPLES_NX_FONTCOLOR -- The color of the toolbar. Default depends on
+#   CONFIG_EXAMPLES_NX_BPP.
+# CONFIG_EXAMPLES_NX_BPP -- Pixels per pixel to use.  Valid options
+#   include 2, 4, 8, 16, 24, and 32.  Default is 32.
 # CONFIG_EXAMPLES_NX_RAWWINDOWS -- Use raw windows;  Default is to
 #   use pretty, framed NXTK windows with toolbars.
 # CONFIG_EXAMPLES_NX_STACKSIZE -- The stacksize to use when creating
@@ -451,6 +459,8 @@ CONFIG_EXAMPLES_NX_VPLANE=0
 #CONFIG_EXAMPLES_NX_COLOR1
 #CONFIG_EXAMPLES_NX_COLOR2
 #CONFIG_EXAMPLES_NX_TBCOLOR
+#CONFIG_EXAMPLES_NX_FONTCOLOR
+CONFIG_EXAMPLES_NX_BPP=CONFIG_SIM_FBBPP
 CONFIG_EXAMPLES_NX_RAWWINDOWS=n
 CONFIG_EXAMPLES_NX_STACKSIZE=8192
 CONFIG_EXAMPLES_NX_CLIENTPRIO=80
diff --git a/configs/sim/nx/defconfig-x11 b/configs/sim/nx/defconfig-x11
index e974d4671c9..88097ab66ac 100644
--- a/configs/sim/nx/defconfig-x11
+++ b/configs/sim/nx/defconfig-x11
@@ -434,10 +434,18 @@ CONFIG_EXAMPLES_NSH_FATMOUNTPT=/tmp
 #
 # CONFIG_EXAMPLES_NX_VPLANE -- The plane to select from the frame-
 #   buffer driver for use in the test.  Default: 0
-# CONFIG_EXAMPLES_NX_BGCOLOR -- The color of the background.  Default: ' '.
-# CONFIG_EXAMPLES_NX_COLOR1 -- The color of window 1. Default: '1'
-# CONFIG_EXAMPLES_NX_COLOR2 -- The color of window 2. Default: '2'
-# CONFIG_EXAMPLES_NX_TBCOLOR -- The color ofthe toolbar. Default: '3'
+# CONFIG_EXAMPLES_NX_BGCOLOR -- The color of the background.  Default depends on
+#   CONFIG_EXAMPLES_NX_BPP.
+# CONFIG_EXAMPLES_NX_COLOR1 -- The color of window 1. Default depends on
+#   CONFIG_EXAMPLES_NX_BPP.
+# CONFIG_EXAMPLES_NX_COLOR2 -- The color of window 2. Default depends on
+#   CONFIG_EXAMPLES_NX_BPP.
+# CONFIG_EXAMPLES_NX_TBCOLOR -- The color of the toolbar. Default depends on
+#   CONFIG_EXAMPLES_NX_BPP.
+# CONFIG_EXAMPLES_NX_FONTCOLOR -- The color of the toolbar. Default depends on
+#   CONFIG_EXAMPLES_NX_BPP.
+# CONFIG_EXAMPLES_NX_BPP -- Pixels per pixel to use.  Valid options
+#   include 2, 4, 8, 16, 24, and 32.  Default is 32.
 # CONFIG_EXAMPLES_NX_RAWWINDOWS -- Use raw windows;  Default is to
 #   use pretty, framed NXTK windows with toolbars.
 # CONFIG_EXAMPLES_NX_STACKSIZE -- The stacksize to use when creating
@@ -451,6 +459,8 @@ CONFIG_EXAMPLES_NX_VPLANE=0
 #CONFIG_EXAMPLES_NX_COLOR1
 #CONFIG_EXAMPLES_NX_COLOR2
 #CONFIG_EXAMPLES_NX_TBCOLOR
+#CONFIG_EXAMPLES_NX_FONTCOLOR
+CONFIG_EXAMPLES_NX_BPP=CONFIG_SIM_FBBPP
 CONFIG_EXAMPLES_NX_RAWWINDOWS=n
 CONFIG_EXAMPLES_NX_STACKSIZE=8192
 CONFIG_EXAMPLES_NX_CLIENTPRIO=80