diff --git a/DPOTPView/DPOTPView.xcodeproj/project.pbxproj b/DPOTPView/DPOTPView.xcodeproj/project.pbxproj
index 4efbcc9..c995ec4 100644
--- a/DPOTPView/DPOTPView.xcodeproj/project.pbxproj
+++ b/DPOTPView/DPOTPView.xcodeproj/project.pbxproj
@@ -186,7 +186,7 @@
 			isa = PBXProject;
 			attributes = {
 				LastSwiftUpdateCheck = 1120;
-				LastUpgradeCheck = 1120;
+				LastUpgradeCheck = 1140;
 				ORGANIZATIONNAME = datt;
 				TargetAttributes = {
 					C6604BEA247B2037005F402D = {
@@ -289,7 +289,7 @@
 		C6604BF5247B2037005F402D /* Debug */ = {
 			isa = XCBuildConfiguration;
 			buildSettings = {
-				CODE_SIGN_IDENTITY = "iPhone Developer";
+				CODE_SIGN_IDENTITY = "";
 				CODE_SIGN_STYLE = Manual;
 				CURRENT_PROJECT_VERSION = 1;
 				DEFINES_MODULE = YES;
@@ -321,7 +321,7 @@
 		C6604BF6247B2037005F402D /* Release */ = {
 			isa = XCBuildConfiguration;
 			buildSettings = {
-				CODE_SIGN_IDENTITY = "iPhone Developer";
+				CODE_SIGN_IDENTITY = "";
 				CODE_SIGN_STYLE = Manual;
 				CURRENT_PROJECT_VERSION = 1;
 				DEFINES_MODULE = YES;
@@ -471,13 +471,14 @@
 				ASSETCATALOG_COMPILER_APPICON_NAME = AppIcon;
 				CODE_SIGN_IDENTITY = "iPhone Developer";
 				CODE_SIGN_STYLE = Manual;
-				DEVELOPMENT_TEAM = 3Y587YMRM5;
+				DEVELOPMENT_TEAM = "";
 				INFOPLIST_FILE = DPOTPView/Info.plist;
 				IPHONEOS_DEPLOYMENT_TARGET = 10.0;
 				LD_RUNPATH_SEARCH_PATHS = (
 					"$(inherited)",
 					"@executable_path/Frameworks",
 				);
+				MARKETING_VERSION = 1;
 				PRODUCT_BUNDLE_IDENTIFIER = "com.datt.DPOTPView-example";
 				PRODUCT_NAME = "$(TARGET_NAME)";
 				PROVISIONING_PROFILE_SPECIFIER = "";
@@ -493,13 +494,14 @@
 				ASSETCATALOG_COMPILER_APPICON_NAME = AppIcon;
 				CODE_SIGN_IDENTITY = "iPhone Developer";
 				CODE_SIGN_STYLE = Manual;
-				DEVELOPMENT_TEAM = 3Y587YMRM5;
+				DEVELOPMENT_TEAM = "";
 				INFOPLIST_FILE = DPOTPView/Info.plist;
 				IPHONEOS_DEPLOYMENT_TARGET = 10.0;
 				LD_RUNPATH_SEARCH_PATHS = (
 					"$(inherited)",
 					"@executable_path/Frameworks",
 				);
+				MARKETING_VERSION = 1;
 				PRODUCT_BUNDLE_IDENTIFIER = "com.datt.DPOTPView-example";
 				PRODUCT_NAME = "$(TARGET_NAME)";
 				PROVISIONING_PROFILE_SPECIFIER = "";
diff --git a/DPOTPView/DPOTPView.xcodeproj/project.xcworkspace/xcuserdata/datt.xcuserdatad/UserInterfaceState.xcuserstate b/DPOTPView/DPOTPView.xcodeproj/project.xcworkspace/xcuserdata/datt.xcuserdatad/UserInterfaceState.xcuserstate
index 6685be4..3f8146b 100644
Binary files a/DPOTPView/DPOTPView.xcodeproj/project.xcworkspace/xcuserdata/datt.xcuserdatad/UserInterfaceState.xcuserstate and b/DPOTPView/DPOTPView.xcodeproj/project.xcworkspace/xcuserdata/datt.xcuserdatad/UserInterfaceState.xcuserstate differ
diff --git a/DPOTPView/DPOTPView/Base.lproj/Main.storyboard b/DPOTPView/DPOTPView/Base.lproj/Main.storyboard
index d95ef9e..fb29717 100644
--- a/DPOTPView/DPOTPView/Base.lproj/Main.storyboard
+++ b/DPOTPView/DPOTPView/Base.lproj/Main.storyboard
@@ -90,6 +90,9 @@
                                     <userDefinedRuntimeAttribute type="color" keyPath="backGroundColorTextField">
                                         <color key="value" white="1" alpha="1" colorSpace="custom" customColorSpace="genericGamma22GrayColorSpace"/>
                                     </userDefinedRuntimeAttribute>
+                                    <userDefinedRuntimeAttribute type="color" keyPath="backGroundColorFilledTextField">
+                                        <color key="value" red="0.50196078430000002" green="0.14117647059999999" blue="0.59999999999999998" alpha="1" colorSpace="custom" customColorSpace="sRGB"/>
+                                    </userDefinedRuntimeAttribute>
                                 </userDefinedRuntimeAttributes>
                             </view>
                             <view contentMode="scaleToFill" translatesAutoresizingMaskIntoConstraints="NO" id="XWD-DZ-vzi" customClass="DPOTPView" customModule="DPOTPView_Example" customModuleProvider="target">
diff --git a/DPOTPView/DPOTPView/DPOTPView/DPOTPView.swift b/DPOTPView/DPOTPView/DPOTPView/DPOTPView.swift
index 7fb780f..e8908d8 100644
--- a/DPOTPView/DPOTPView/DPOTPView/DPOTPView.swift
+++ b/DPOTPView/DPOTPView/DPOTPView/DPOTPView.swift
@@ -45,6 +45,9 @@ public protocol DPOTPViewDelegate {
     /** Background color for the textField */
     @IBInspectable open dynamic var backGroundColorTextField: UIColor = UIColor.clear
     
+    /** Background color for the filled textField */
+    @IBInspectable open dynamic var backGroundColorFilledTextField: UIColor?
+    
     /** Border color for the TextField */
     @IBInspectable open dynamic var borderColorTextField: UIColor?
     
@@ -146,7 +149,7 @@ public protocol DPOTPViewDelegate {
             textField.borderStyle = .none
             textField.tag = i * 1000
             textField.tintColor = tintColorTextField
-            textField.layer.backgroundColor = backGroundColorTextField.cgColor
+            textField.backgroundColor = backGroundColorTextField
             textField.isSecureTextEntry = isSecureTextEntry
             textField.font = fontTextField
             textField.keyboardAppearance = isDarkKeyboard ? .dark : .default
@@ -285,10 +288,19 @@ protocol OTPBackTextFieldDelegate {
 }
 
 
-class OTPBackTextField: UITextField {
+fileprivate class OTPBackTextField: UITextField {
     
     var OTPBackDelegate : OTPBackTextFieldDelegate?
     weak var dpOTPView : DPOTPView!
+    override var text: String? {
+        didSet {
+            if text?.isEmpty ?? true {
+                self.backgroundColor = dpOTPView.backGroundColorTextField
+            } else {
+                self.backgroundColor = dpOTPView.backGroundColorFilledTextField ?? dpOTPView.backGroundColorTextField
+            }
+        }
+    }
     
     override func deleteBackward() {
         super.deleteBackward()
@@ -383,7 +395,7 @@ class OTPBackTextField: UITextField {
 }
 
 
-extension String {
+fileprivate extension String {
     subscript(_ i: Int) -> String {
         let idx1 = index(startIndex, offsetBy: i)
         let idx2 = index(idx1, offsetBy: 1)