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Example/FSPopoverView/Base.lproj/Main.storyboard

@@ -22,7 +22,7 @@
                         <subviews>
                             <button opaque="NO" contentMode="scaleToFill" contentHorizontalAlignment="center" contentVerticalAlignment="center" buttonType="system" lineBreakMode="middleTruncation" translatesAutoresizingMaskIntoConstraints="NO" id="xfz-lV-QsB">
                                 <rect key="frame" x="154" y="390.66666666666669" width="67" height="31"/>
-                                <color key="backgroundColor" systemColor="systemMintColor"/>
+                                <color key="backgroundColor" systemColor="systemGray5Color"/>
                                 <state key="normal" title="Button"/>
                                 <buttonConfiguration key="configuration" style="plain" title="Button"/>
                                 <connections>
@@ -43,8 +43,8 @@
         </scene>
     </scenes>
     <resources>
-        <systemColor name="systemMintColor">
-            <color red="0.0" green="0.7803921568627451" blue="0.74509803921568629" alpha="1" colorSpace="custom" customColorSpace="sRGB"/>
+        <systemColor name="systemGray5Color">
+            <color red="0.89803921568627454" green="0.89803921568627454" blue="0.91764705882352937" alpha="1" colorSpace="custom" customColorSpace="sRGB"/>
         </systemColor>
     </resources>
 </document>

Example/FSPopoverView/ViewController.swift

@@ -28,10 +28,11 @@ class ViewController: UIViewController {
         guard let button = sender as? UIButton else { return }
         let popoverView = FSPopoverView()
         popoverView.dataSource = self
-        popoverView.borderWidth = 2.0
+//        popoverView.borderWidth = 1.0
         popoverView.borderColor = .red
         popoverView.shadowColor = .green
         popoverView.shadowRadius = 3.0
+        popoverView.shadowOpacity = 0.6
 //        popoverView.arrowDirection = .right
 //        popoverView.autosetsArrowDirection = false
         popoverView.showTo(button)