diff --git a/app/src/main/java/margaritov/preference/colorpicker/AlphaPatternDrawable.java b/app/src/main/java/margaritov/preference/colorpicker/AlphaPatternDrawable.java
index 709aa72..0ef5641 100644
--- a/app/src/main/java/margaritov/preference/colorpicker/AlphaPatternDrawable.java
+++ b/app/src/main/java/margaritov/preference/colorpicker/AlphaPatternDrawable.java
@@ -24,6 +24,7 @@
 import android.graphics.Paint;
 import android.graphics.Rect;
 import android.graphics.drawable.Drawable;
+import android.graphics.PixelFormat;
 
 /**
  * This drawable that draws a simple white and gray chessboard pattern.
@@ -60,7 +61,7 @@ public void draw(Canvas canvas) {
 
 	@Override
 	public int getOpacity() {
-		return 0;
+		return PixelFormat.UNKNOWN;
 	}
 
 	@Override
diff --git a/app/src/main/java/margaritov/preference/colorpicker/ColorPickerPreference.java b/app/src/main/java/margaritov/preference/colorpicker/ColorPickerPreference.java
index 5ebd28f..feba9c3 100644
--- a/app/src/main/java/margaritov/preference/colorpicker/ColorPickerPreference.java
+++ b/app/src/main/java/margaritov/preference/colorpicker/ColorPickerPreference.java
@@ -254,7 +254,7 @@ public static int convertToColorInt(String argb) throws NumberFormatException {
     		argb = argb.replace("#", "");
     	}
 
-        int alpha = -1, red = -1, green = -1, blue = -1;
+        int alpha = 0, red = 0, green = 0, blue = 0;
 
         if (argb.length() == 8) {
             alpha = Integer.parseInt(argb.substring(0, 2), 16);