diff --git a/ChangeLog.rtro b/ChangeLog.rtro
index e57c8b8..c496cad 100644
--- a/ChangeLog.rtro
+++ b/ChangeLog.rtro
@@ -1,6 +1,10 @@
 ------------------------
 Changes for top of trunk
 ------------------------
+2021-08-01 Daniel Hawkins
+	* ground/nimground/Nimground3_purple.rtro.11*.png: Reduce to 32 colors in palette.
+	       Not using XPM palette due to a lack of purples on it.
+
 2021-07-28 Daniel Hawkins
 	* door/Locked/key_blue.rtro.111.png,
 	  door/Locked/ldoor_blue1.rtro.111.png,
diff --git a/ground/nimground/Nimground3_purple.rtro.111.png b/ground/nimground/Nimground3_purple.rtro.111.png
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diff --git a/ground/nimground/Nimground3_purple.rtro.112.png b/ground/nimground/Nimground3_purple.rtro.112.png
index c42f337..0bfb31f 100644
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diff --git a/ground/nimground/Nimground3_purple.rtro.113.png b/ground/nimground/Nimground3_purple.rtro.113.png
index 38df150..4945e01 100644
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diff --git a/ground/nimground/Nimground3_purple.rtro.114.png b/ground/nimground/Nimground3_purple.rtro.114.png
index db30c92..f59c65f 100644
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