- fix wrong ref

- theme "choose date" button

src/main/java/com/owncloud/android/datamodel/MediaProvider.java

@@ -33,8 +33,8 @@ import android.view.View;
 
 import com.owncloud.android.MainApp;
 import com.owncloud.android.R;
-import com.owncloud.android.utils.DisplayUtils;
 import com.owncloud.android.utils.PermissionUtil;
+import com.owncloud.android.utils.ThemeUtils;
 
 import java.io.File;
 import java.util.ArrayList;
@@ -79,7 +79,7 @@ public class MediaProvider {
                             }
                         });
 
-                DisplayUtils.colorSnackbar(activity.getApplicationContext(), snackbar);
+                ThemeUtils.colorSnackbar(activity.getApplicationContext(), snackbar);
 
                 snackbar.show();
             } else {

src/main/java/com/owncloud/android/ui/fragment/contactsbackup/ContactsBackupFragment.java

@@ -24,8 +24,8 @@ import android.Manifest;
 import android.accounts.Account;
 import android.app.DatePickerDialog;
 import android.content.DialogInterface;
-import android.graphics.PorterDuff;
 import android.content.Intent;
+import android.graphics.PorterDuff;
 import android.os.AsyncTask;
 import android.os.Bundle;
 import android.support.annotation.NonNull;
@@ -78,9 +78,6 @@ public class ContactsBackupFragment extends FileFragment implements DatePickerDi
     @BindView(R.id.contacts_automatic_backup)
     public SwitchCompat backupSwitch;
 
-    @BindView(R.id.contacts_header_backup)
-    public TextView contactsBackupHeader;
-
     @BindView(R.id.contacts_datepicker)
     public AppCompatButton contactsDatePickerBtn;
 
@@ -170,8 +167,9 @@ public class ContactsBackupFragment extends FileFragment implements DatePickerDi
         view.findViewById(R.id.contacts_backup_now).getBackground()
                 .setColorFilter(accentColor, PorterDuff.Mode.SRC_ATOP);
 
-        contactsRestoreHeader.setTextColor(accentColor);
-        contactsBackupHeader.setTextColor(accentColor);
+        AppCompatButton chooseDate = (AppCompatButton) view.findViewById(R.id.contacts_datepicker);
+        chooseDate.getBackground().setColorFilter(accentColor, PorterDuff.Mode.SRC_ATOP);
+        chooseDate.setTextColor(ThemeUtils.fontColor());
 
         return view;
     }