diff --git a/K7Main.cpp b/K7Main.cpp
index d8d0cf3..81f004b 100644
--- a/K7Main.cpp
+++ b/K7Main.cpp
@@ -58,6 +58,12 @@ K7Main::K7Main(const WEnvironment& env)
     OwnerTrustLevel[GpgME::Key::OwnerTrust::Unknown] = TR("UidUnknown");
     m_uploader = NULL; m_deleter = NULL;
     m_keyEdit = new KeyEdit(this);
+    
+    WLink link;
+    const WString cssFile = WApplication::appRoot() + _APPNAME_ 
+                        + WString(".css");
+    link.setUrl(cssFile.toUTF8());
+    WApplication::useStyleSheet(link);
 }
 
 K7Main::~K7Main()
diff --git a/PopupCertifyUserId.cpp b/PopupCertifyUserId.cpp
index 78f0186..3f5f6ae 100644
--- a/PopupCertifyUserId.cpp
+++ b/PopupCertifyUserId.cpp
@@ -44,6 +44,8 @@ void PopupCertifyUserId::Create(vector<WString>& privateKeys,
 {
     m_fprKeyToSign = fprKeyToSign;
     m_cwMain = static_cast<WContainerWidget*> (implementation());
+    // White in css file, like default background color.
+    m_cwMain->setStyleClass("popup");
 
     WVBoxLayout * vblMain = new WVBoxLayout();
     m_cwMain->setLayout(unique_ptr<WVBoxLayout> (vblMain));
diff --git a/PopupDeleter.cpp b/PopupDeleter.cpp
index a7c638a..ee48801 100644
--- a/PopupDeleter.cpp
+++ b/PopupDeleter.cpp
@@ -28,6 +28,8 @@ Deleter::~Deleter() {
 
 void Deleter::Create() {
     m_cwMain = static_cast<WContainerWidget*> (implementation());
+    // White in css file, like default background color.
+    m_cwMain->setStyleClass("popup");
     WVBoxLayout * vblMain = new WVBoxLayout();
     m_cwMain->setLayout(unique_ptr<WVBoxLayout> (vblMain));
     m_cbConfirm = new WCheckBox(TR("Confirm"));
diff --git a/PopupUploader.cpp b/PopupUploader.cpp
index fd69ea4..45659a3 100644
--- a/PopupUploader.cpp
+++ b/PopupUploader.cpp
@@ -31,6 +31,8 @@ void Uploader::Create() {
     m_upload->setFileTextSize(10240); // Is really approximate
     m_upload->setMultiple(false);
     m_cwMain = static_cast<WContainerWidget*> (implementation());
+    // White in css file, like default background color.
+    m_cwMain->setStyleClass("popup");
     WVBoxLayout * vblMain = new WVBoxLayout();
     m_cwMain->setLayout(unique_ptr<WVBoxLayout> (vblMain));
     vblMain->addWidget(unique_ptr<WFileUpload> (m_upload));
diff --git a/WTAPPROOT/K7/K7.css b/WTAPPROOT/K7/K7.css
new file mode 100644
index 0000000..2e289cf
--- /dev/null
+++ b/WTAPPROOT/K7/K7.css
@@ -0,0 +1,10 @@
+/*
+ * Default page color is white.
+ * Default popup background is transparent.
+ * Can't use inherit :
+ *  root()->decorationStyle().backgroundColor().{red,green, blue}
+ *  are all 0.
+*/
+div.popup {
+    background-color: lavender;
+} 
diff --git a/nbproject/configurations.xml b/nbproject/configurations.xml
index dabe06a..0332d86 100644
--- a/nbproject/configurations.xml
+++ b/nbproject/configurations.xml
@@ -52,6 +52,17 @@
                    kind="IMPORTANT_FILES_FOLDER">
       <itemPath>Makefile</itemPath>
     </logicalFolder>
+    <logicalFolder name="TestFiles"
+                   displayName="Test Files"
+                   projectFiles="false"
+                   kind="TEST_LOGICAL_FOLDER">
+    </logicalFolder>
+    <logicalFolder name="ExternalFiles"
+                   displayName="Important Files"
+                   projectFiles="false"
+                   kind="IMPORTANT_FILES_FOLDER">
+      <itemPath>Makefile</itemPath>
+    </logicalFolder>
   </logicalFolder>
   <projectmakefile>Makefile</projectmakefile>
   <confs>
diff --git a/nbproject/private/configurations.xml b/nbproject/private/configurations.xml
index 3db8f9e..2c9b830 100644
--- a/nbproject/private/configurations.xml
+++ b/nbproject/private/configurations.xml
@@ -13,8 +13,6 @@
         <gdb_interceptlist>
           <gdbinterceptoptions gdb_all="false" gdb_unhandled="true" gdb_unexpected="true"/>
         </gdb_interceptlist>
-        <gdb_signals>
-        </gdb_signals>
         <gdb_options>
           <DebugOptions>
           </DebugOptions>
@@ -27,6 +25,7 @@
       <runprofile version="9">
         <runcommandpicklist>
           <runcommandpicklistitem>"${OUTPUT_PATH}"</runcommandpicklistitem>
+          <runcommandpicklistitem>"${OUTPUT_PATH}" --docroot ../../../ --https-address localhost --https-port 8080 --ssl-client-verification required --ssl-ca-certificates /home/user/tmp/ca.crt --ssl-certificate /home/user/tmp/cert.pem --ssl-private-key /home/user/tmp/cert.key --ssl-tmp-dh /home/user/tmp/dh.pem</runcommandpicklistitem>
           <runcommandpicklistitem>"${OUTPUT_PATH}" --docroot . --https-address localhost --https-port 8080 --ssl-client-verification required --ssl-ca-certificates /home/user/tmp/ca.crt --ssl-certificate /home/user/tmp/cert.pem --ssl-private-key /home/user/tmp/cert.key --ssl-tmp-dh /home/user/tmp/dh.pem</runcommandpicklistitem>
         </runcommandpicklist>
         <runcommand>"${OUTPUT_PATH}" --docroot . --https-address localhost --https-port 8080 --ssl-client-verification required --ssl-ca-certificates /home/user/tmp/ca.crt --ssl-certificate /home/user/tmp/cert.pem --ssl-private-key /home/user/tmp/cert.key --ssl-tmp-dh /home/user/tmp/dh.pem</runcommand>