Fixes ColorUIResource#brighter and ColorUIResource#brighter not returning a ColorUIResource.

core/src/main/java/com/github/weisj/darklaf/task/AccentColorAdjustmentTask.java

@@ -29,8 +29,7 @@ import java.util.List;
 import java.util.Properties;
 import java.util.logging.Logger;
 
-import javax.swing.plaf.ColorUIResource;
-
+import com.github.weisj.darklaf.DarkColorUIResource;
 import com.github.weisj.darklaf.color.DarkColorModelHSB;
 import com.github.weisj.darklaf.theme.Theme;
 import com.github.weisj.darklaf.util.Pair;
@@ -113,7 +112,7 @@ public class AccentColorAdjustmentTask extends ColorAdjustmentTask {
             Color color = DarkColorModelHSB.getColorFromHSBValues(mapValue(hsbMatch[0], info.hAdj),
                                                                   mapValue(hsbMatch[1], info.sAdj),
                                                                   mapValue(hsbMatch[2], info.bAdj));
-            return new ColorUIResource(color);
+            return new DarkColorUIResource(color);
         }
         return obj;
     }

core/src/main/java/com/github/weisj/darklaf/ui/tree/DarkTreeUI.java

@@ -152,6 +152,7 @@ public class DarkTreeUI extends BasicTreeUI implements PropertyChangeListener {
     @Override
     protected void installDefaults() {
         super.installDefaults();
+        LookAndFeel.installColors(tree, "Tree.background", "Tree.foreground");
         selectionBackground = UIManager.getColor("Tree.unfocusedSelectionBackground");
         focusSelectionBackground = UIManager.getColor("Tree.selectionBackground");
         focusSelectedLineColor = UIManager.getColor("Tree.lineFocusSelected");

property-loader/src/main/java/com/github/weisj/darklaf/DarkColorUIResource.java

@@ -0,0 +1,58 @@
+/*
+ * MIT License
+ *
+ * Copyright (c) 2020 Jannis Weis
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in all
+ * copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+ * SOFTWARE.
+ *
+ */
+package com.github.weisj.darklaf;
+
+import java.awt.*;
+
+import javax.swing.plaf.ColorUIResource;
+
+public class DarkColorUIResource extends ColorUIResource {
+
+    public DarkColorUIResource(final int r, final int g, final int b) {
+        super(r, g, b);
+    }
+
+    public DarkColorUIResource(final int rgb) {
+        super(rgb);
+    }
+
+    public DarkColorUIResource(final float r, final float g, final float b) {
+        super(r, g, b);
+    }
+
+    public DarkColorUIResource(final Color c) {
+        super(c);
+    }
+
+    @Override
+    public Color darker() {
+        return new DarkColorUIResource(super.darker());
+    }
+
+    @Override
+    public Color brighter() {
+        return new DarkColorUIResource(super.brighter());
+    }
+}

property-loader/src/main/java/com/github/weisj/darklaf/PropertyLoader.java

@@ -37,7 +37,6 @@ import java.util.logging.Logger;
 import java.util.stream.Collectors;
 
 import javax.swing.*;
-import javax.swing.plaf.ColorUIResource;
 import javax.swing.plaf.DimensionUIResource;
 import javax.swing.plaf.FontUIResource;
 import javax.swing.plaf.InsetsUIResource;
@@ -217,7 +216,7 @@ public final class PropertyLoader {
                     ? Boolean.TRUE
                     : PropertyValue.FALSE.equalsIgnoreCase(value) ? Boolean.FALSE : null;
             if (color != null && (value.length() == 6 || value.length() == 8)) {
-                return new ColorUIResource(color);
+                return new DarkColorUIResource(color);
             } else if (invVal != null) {
                 return invVal;
             } else if (boolVal != null) {

windows/src/main/java/com/github/weisj/darklaf/platform/windows/ui/WindowsTitlePane.java

@@ -782,6 +782,7 @@ public class WindowsTitlePane extends CustomTitlePane {
                 }
             } else if (PropertyKey.TITLE.equals(name)) {
                 titleLabel.setText(pce.getNewValue() == null ? "" : pce.getNewValue().toString());
+                doLayout();
                 repaint();
             } else if (PropertyKey.COMPONENT_ORIENTATION.equals(name)) {
                 revalidate();