Shadow in ColorChooser is now controlled by %shadow property.

src/main/java/com/weis/darklaf/ui/colorchooser/DarkPreviewPanel.java

@@ -69,13 +69,11 @@ public class DarkPreviewPanel extends JPanel {
         g.setColor(Color.white);
         g.fillRect(offsetX, 0, SQUARE_SIZE, SQUARE_SIZE);
         g.setColor(color);
-        g.fillRect(offsetX + INNER_GAP,
+        g.fillRect(offsetX + INNER_GAP, INNER_GAP,
-                   INNER_GAP,
                    SQUARE_SIZE - (INNER_GAP * 2),
                    SQUARE_SIZE - (INNER_GAP * 2));
         g.setColor(Color.white);
-        g.fillRect(offsetX + INNER_GAP * 2,
+        g.fillRect(offsetX + INNER_GAP * 2, INNER_GAP * 2,
-                   INNER_GAP * 2,
                    SQUARE_SIZE - (INNER_GAP * 4),
                    SQUARE_SIZE - (INNER_GAP * 4));
 
@@ -86,13 +84,11 @@ public class DarkPreviewPanel extends JPanel {
         g.setColor(Color.black);
         g.fillRect(offsetX, 0, SQUARE_SIZE, SQUARE_SIZE);
         g.setColor(color);
-        g.fillRect(offsetX + INNER_GAP,
+        g.fillRect(offsetX + INNER_GAP, INNER_GAP,
-                   INNER_GAP,
                    SQUARE_SIZE - (INNER_GAP * 2),
                    SQUARE_SIZE - (INNER_GAP * 2));
         g.setColor(Color.white);
-        g.fillRect(offsetX + INNER_GAP * 2,
+        g.fillRect(offsetX + INNER_GAP * 2, INNER_GAP * 2,
-                   INNER_GAP * 2,
                    SQUARE_SIZE - (INNER_GAP * 4),
                    SQUARE_SIZE - (INNER_GAP * 4));
         g.translate(-(SQUARE_SIZE + SQUARE_GAP), 0);
@@ -101,8 +97,7 @@ public class DarkPreviewPanel extends JPanel {
         g.setColor(Color.white);
         g.fillRect(offsetX, 0, SQUARE_SIZE, SQUARE_SIZE);
         g.setColor(color);
-        g.fillRect(offsetX + INNER_GAP,
+        g.fillRect(offsetX + INNER_GAP, INNER_GAP,
-                   INNER_GAP,
                    SQUARE_SIZE - (INNER_GAP * 2),
                    SQUARE_SIZE - (INNER_GAP * 2));
         g.translate(-(SQUARE_SIZE + SQUARE_GAP), -(SQUARE_SIZE + SQUARE_GAP));
@@ -112,13 +107,11 @@ public class DarkPreviewPanel extends JPanel {
         g.setColor(Color.white);
         g.fillRect(offsetX, 0, SQUARE_SIZE, SQUARE_SIZE);
         g.setColor(color);
-        g.fillRect(offsetX + INNER_GAP,
+        g.fillRect(offsetX + INNER_GAP, INNER_GAP,
-                   INNER_GAP,
                    SQUARE_SIZE - (INNER_GAP * 2),
                    SQUARE_SIZE - (INNER_GAP * 2));
         g.setColor(Color.black);
-        g.fillRect(offsetX + INNER_GAP * 2,
+        g.fillRect(offsetX + INNER_GAP * 2, INNER_GAP * 2,
-                   INNER_GAP * 2,
                    SQUARE_SIZE - (INNER_GAP * 4),
                    SQUARE_SIZE - (INNER_GAP * 4));
         g.translate(-((SQUARE_SIZE + SQUARE_GAP) * 2), 0);
@@ -127,8 +120,7 @@ public class DarkPreviewPanel extends JPanel {
         g.setColor(Color.black);
         g.fillRect(offsetX, 0, SQUARE_SIZE, SQUARE_SIZE);
         g.setColor(color);
-        g.fillRect(offsetX + INNER_GAP,
+        g.fillRect(offsetX + INNER_GAP, INNER_GAP,
-                   INNER_GAP,
                    SQUARE_SIZE - (INNER_GAP * 2),
                    SQUARE_SIZE - (INNER_GAP * 2));
         g.translate(-((SQUARE_SIZE + SQUARE_GAP) * 2), -(SQUARE_SIZE + SQUARE_GAP));

src/main/java/com/weis/darklaf/ui/colorchooser/SlideComponent.java

@@ -1,6 +1,7 @@
 package com.weis.darklaf.ui.colorchooser;
 
 import com.weis.darklaf.components.alignment.Alignment;
+import com.weis.darklaf.util.ColorUtil;
 import org.jetbrains.annotations.Contract;
 import org.jetbrains.annotations.NotNull;
 
@@ -166,7 +167,7 @@ class SlideComponent extends JComponent {
             arrowShadow.addPoint(x + 7, y + 7);
             arrowShadow.addPoint(x - 5, y + 13);
 
-            g2d.setColor(new Color(0, 0, 0, 70));
+            g2d.setColor(ColorUtil.toAlpha(UIManager.getColor("ColorChooser.sliderShadow"), 0.5));
             g2d.fill(arrowShadow);
 
             Polygon arrowHead = new Polygon();
@@ -184,7 +185,7 @@ class SlideComponent extends JComponent {
             arrowShadow.addPoint(x + 13, y - 5);
             arrowShadow.addPoint(x + 7, y + 7);
 
-            g2d.setColor(new Color(0, 0, 0, 70));
+            g2d.setColor(ColorUtil.toAlpha(UIManager.getColor("ColorChooser.sliderShadow"), 0.5));
             g2d.fill(arrowShadow);
 
             Polygon arrowHead = new Polygon();

src/main/java/com/weis/darklaf/util/ColorUtil.java

@@ -28,7 +28,13 @@ public final class ColorUtil {
     @Contract("_, _ -> new")
     public static Color toAlpha(final Color color, final int a) {
         Color c = color != null ? color : Color.black;
-        return new Color(c.getRed(), c.getGreen(), c.getBlue(), a);
+        return new Color(c.getRed(), c.getGreen(), c.getBlue(), Math.min(Math.max(0, a), 255));
+    }
+
+    @NotNull
+    @Contract("_, _ -> new")
+    public static Color toAlpha(final Color color, final double alpha) {
+        return toAlpha(color, (int) (alpha * 255));
     }
 
     public static Color fromHex(final String str, final Color defaultValue) {

src/main/resources/com/weis/darklaf/properties/ui/colorChooser.properties

@@ -12,6 +12,7 @@ ColorChooser.swatchesRecentSwatchSize      = 15,15
 ColorChooser.swatchesSwatchSize            = 15,15
 ColorChooser.swatchBorderColor             = %borderSecondary
 ColorChooser.swatchGridColor               = %gridLine
+ColorChooser.sliderShadow                  = %shadow
 
 #Icons
 ColorChooser.pipette.icon                  = misc/pipette.svg[aware]