diff --git a/common/src/main/java/xyz/jpenilla/squaremap/common/config/Advanced.java b/common/src/main/java/xyz/jpenilla/squaremap/common/config/Advanced.java
index 0273dbb1..fff5a5fb 100644
--- a/common/src/main/java/xyz/jpenilla/squaremap/common/config/Advanced.java
+++ b/common/src/main/java/xyz/jpenilla/squaremap/common/config/Advanced.java
@@ -1,10 +1,7 @@
 package xyz.jpenilla.squaremap.common.config;
 
-import io.leangen.geantyref.TypeToken;
-import java.util.HashMap;
 import java.util.List;
 import java.util.Map;
-import org.spongepowered.configurate.ConfigurationNode;
 import org.spongepowered.configurate.NodePath;
 import org.spongepowered.configurate.transformation.ConfigurationTransformation;
 import xyz.jpenilla.squaremap.common.data.DirectoryProvider;
@@ -12,7 +9,7 @@
 
 @SuppressWarnings("unused")
 public final class Advanced extends AbstractConfig {
-    private static final int LATEST_VERSION = 3;
+    private static final int LATEST_VERSION = 4;
 
     Advanced(final DirectoryProvider directoryProvider) {
         super(directoryProvider.dataDirectory(), Advanced.class, "advanced.yml", LATEST_VERSION);
@@ -20,21 +17,21 @@ public final class Advanced extends AbstractConfig {
 
     @Override
     protected void addVersions(ConfigurationTransformation.VersionedBuilder versionedBuilder) {
-        final ConfigurationTransformation oneToTwo = ConfigurationTransformation.builder()
-            .addAction(NodePath.path("world-settings", "default", "color-overrides"), (path, node) -> {
-                final TypeToken<Map<String, String>> type = new TypeToken<>() {};
-
-                final ConfigurationNode foliageNode = node.node("biomes", "foliage");
-                final Map<String, String> foliageMap = foliageNode.get(type, new HashMap<>());
-                foliageMap.put("minecraft:mangrove_swamp", "#6f9623");
-                foliageNode.set(type, foliageMap);
+        final NodePath defaultColorOverridesPath = NodePath.path("world-settings", "default", "color-overrides");
 
-                final ConfigurationNode blocksNode = node.node("blocks");
-                final Map<String, String> blocksMap = blocksNode.get(type, new HashMap<>());
-                blocksMap.put("minecraft:pink_petals", "#FFB4DB");
-                blocksNode.set(type, blocksMap);
-                return null;
-            })
+        final ConfigurationTransformation oneToTwo = ConfigurationTransformation.builder()
+            .addAction(
+                defaultColorOverridesPath.withAppendedChild("biomes").withAppendedChild("foliage"),
+                Transformations.modifyStringMap(map -> {
+                    map.put("minecraft:mangrove_swamp", "#6f9623");
+                })
+            )
+            .addAction(
+                defaultColorOverridesPath.withAppendedChild("blocks"),
+                Transformations.modifyStringMap(map -> {
+                    map.put("minecraft:pink_petals", "#FFB4DB");
+                })
+            )
             .build();
         final ConfigurationTransformation twoToThree = ConfigurationTransformation.builder()
             .addAction(NodePath.path("world-settings"), Transformations.eachMapChild(worldSection -> {
@@ -50,9 +47,17 @@ protected void addVersions(ConfigurationTransformation.VersionedBuilder versione
                 );
             }))
             .build();
+        final ConfigurationTransformation threeToFour = ConfigurationTransformation.builder()
+            .addAction(
+                defaultColorOverridesPath.withAppendedChild("blocks"),
+                Transformations.modifyStringMap(map -> {
+                    map.put("minecraft:pale_oak_leaves", "#626760");
+                }))
+            .build();
 
         versionedBuilder.addVersion(2, oneToTwo);
-        versionedBuilder.addVersion(LATEST_VERSION, twoToThree);
+        versionedBuilder.addVersion(3, twoToThree);
+        versionedBuilder.addVersion(LATEST_VERSION, threeToFour);
     }
 
     static Advanced config;
diff --git a/common/src/main/java/xyz/jpenilla/squaremap/common/config/Transformations.java b/common/src/main/java/xyz/jpenilla/squaremap/common/config/Transformations.java
index 2575f4e6..2a4020f6 100644
--- a/common/src/main/java/xyz/jpenilla/squaremap/common/config/Transformations.java
+++ b/common/src/main/java/xyz/jpenilla/squaremap/common/config/Transformations.java
@@ -1,10 +1,14 @@
 package xyz.jpenilla.squaremap.common.config;
 
+import io.leangen.geantyref.TypeFactory;
 import io.leangen.geantyref.TypeToken;
+import java.lang.reflect.Type;
+import java.util.HashMap;
 import java.util.List;
 import java.util.Map;
 import java.util.Objects;
 import java.util.Set;
+import java.util.function.Consumer;
 import org.checkerframework.checker.nullness.qual.NonNull;
 import org.checkerframework.checker.nullness.qual.Nullable;
 import org.checkerframework.framework.qual.DefaultQualifier;
@@ -34,6 +38,27 @@ static TransformAction eachMapChild(final CheckedConsumer<ConfigurationNode, Con
         };
     }
 
+    static TransformAction modifyStringMap(
+        final Consumer<Map<String, String>> consumer
+    ) {
+        return modifyMap(String.class, String.class, consumer);
+    }
+
+    @SuppressWarnings("unchecked")
+    static <K, V> TransformAction modifyMap(
+        final Class<K> keyType,
+        final Class<V> valueType,
+        final Consumer<Map<K, V>> consumer
+    ) {
+        return (path, node) -> {
+            final Type type = TypeFactory.parameterizedClass(Map.class, keyType, valueType);
+            final Map<K, V> map = (Map<K, V>) node.get(type, new HashMap<>());
+            consumer.accept(map);
+            node.set(type, map);
+            return null;
+        };
+    }
+
     // expects nodes to be round-trip representable as List<String> or Map<String, String>
     static void applyMapKeyOrListValueRenames(final List<ConfigurationNode> sections, final Map<Set<String>, String> renames) throws SerializationException {
         for (final ConfigurationNode sectionNode : sections) {
diff --git a/common/src/main/java/xyz/jpenilla/squaremap/common/config/WorldAdvanced.java b/common/src/main/java/xyz/jpenilla/squaremap/common/config/WorldAdvanced.java
index 72cd95e0..73b027d8 100644
--- a/common/src/main/java/xyz/jpenilla/squaremap/common/config/WorldAdvanced.java
+++ b/common/src/main/java/xyz/jpenilla/squaremap/common/config/WorldAdvanced.java
@@ -150,6 +150,7 @@ private void colorOverrideBlocksSettings() {
                 Map.entry("minecraft:attached_pumpkin_stem", "#E0C71C"),
                 Map.entry("minecraft:spruce_leaves", "#619961"),
                 Map.entry("minecraft:birch_leaves", "#80A755"),
+                Map.entry("minecraft:pale_oak_leaves", "#626760"),
                 Map.entry("minecraft:lava", "#EA5C0F"),
                 Map.entry("minecraft:glass", "#FFFFFF")
             )
diff --git a/common/src/main/java/xyz/jpenilla/squaremap/common/data/BiomeColors.java b/common/src/main/java/xyz/jpenilla/squaremap/common/data/BiomeColors.java
index d92cf86e..2506e2b5 100644
--- a/common/src/main/java/xyz/jpenilla/squaremap/common/data/BiomeColors.java
+++ b/common/src/main/java/xyz/jpenilla/squaremap/common/data/BiomeColors.java
@@ -21,7 +21,6 @@
 import xyz.jpenilla.squaremap.common.util.Colors;
 import xyz.jpenilla.squaremap.common.util.chunksnapshot.ChunkSnapshot;
 
-// TODO(1.21.2): pale forest colors, general foliage colors (dark forest?)
 @DefaultQualifier(NonNull.class)
 public final class BiomeColors {
     private static final int BLOCKPOS_BIOME_CACHE_SIZE = 4096;
diff --git a/common/src/main/java/xyz/jpenilla/squaremap/common/util/AbstractFluidColorExporter.java b/common/src/main/java/xyz/jpenilla/squaremap/common/util/AbstractFluidColorExporter.java
index b7186803..b0a10939 100644
--- a/common/src/main/java/xyz/jpenilla/squaremap/common/util/AbstractFluidColorExporter.java
+++ b/common/src/main/java/xyz/jpenilla/squaremap/common/util/AbstractFluidColorExporter.java
@@ -19,7 +19,6 @@
 import org.spongepowered.configurate.yaml.YamlConfigurationLoader;
 import xyz.jpenilla.squaremap.common.data.DirectoryProvider;
 
-// TODO(1.21.2): test fabric & neoforge
 @DefaultQualifier(NonNull.class)
 public abstract class AbstractFluidColorExporter {
     private final DirectoryProvider directoryProvider;