diff -Naur chromium.orig/gtk3-fix.patch chromium/gtk3-fix.patch
--- chromium.orig/gtk3-fix.patch	1970-01-01 01:00:00.000000000 +0100
+++ chromium/gtk3-fix.patch	2016-07-23 22:52:52.883810115 +0200
@@ -0,0 +1,27 @@
+--- chromium-52.0.2743.82.orig/chrome/browser/ui/libgtk2ui/native_theme_gtk2.cc	2016-07-23 20:22:44.965804588 +0000
++++ chromium-52.0.2743.82/chrome/browser/ui/libgtk2ui/native_theme_gtk2.cc	2016-07-23 20:24:05.772234006 +0000
+@@ -138,6 +138,11 @@
+       gtk_widget_get_style_context(widget), stateMap[state], &color);
+   G_GNUC_END_IGNORE_DEPRECATIONS
+ 
++  if (color.alpha == 0.0)
++    gtk_style_context_get_background_color(
++        gtk_widget_get_style_context(gtk_widget_get_toplevel(widget)),
++        stateMap[state], &color);
++
+   // Hack for default color
+   if (color.alpha == 0.0)
+     color = {1, 1, 1, 1};
+@@ -510,8 +515,11 @@
+ GtkWidget* NativeThemeGtk2::GetLabel() const {
+   static GtkWidget* fake_label = NULL;
+ 
+-  if (!fake_label)
++  if (!fake_label) {
+     fake_label = gtk_label_new("");
++    gtk_style_context_add_class(
++        gtk_widget_get_style_context(fake_label), "gtkstyle-fallback");
++  }
+ 
+   return fake_label;
+ }
diff -Naur chromium.orig/PKGBUILD chromium/PKGBUILD
--- chromium.orig/PKGBUILD	2016-07-23 22:22:04.062134023 +0200
+++ chromium/PKGBUILD	2016-07-23 23:15:01.069423278 +0200
@@ -12,12 +12,12 @@
 arch=('i686' 'x86_64')
 url="http://www.chromium.org/"
 license=('BSD')
-depends=('gtk2' 'nss' 'alsa-lib' 'xdg-utils' 'bzip2' 'libevent' 'libxss'
+depends=('gtk3' 'nss' 'alsa-lib' 'xdg-utils' 'bzip2' 'libevent' 'libxss'
          'libexif' 'libgcrypt' 'ttf-font' 'systemd' 'dbus' 'flac' 'snappy'
          'speech-dispatcher' 'pciutils' 'libpulse' 'harfbuzz' 'libsecret'
          'libvpx' 'perl' 'perl-file-basedir' 'desktop-file-utils'
          'hicolor-icon-theme')
-makedepends=('python2' 'gperf' 'yasm' 'mesa' 'ninja')
+makedepends=('gtk2' 'python2' 'gperf' 'yasm' 'mesa' 'ninja')
 makedepends_x86_64=('lib32-gcc-libs' 'lib32-zlib')
 optdepends=('kdebase-kdialog: needed for file dialogs in KDE'
             'gnome-keyring: for storing passwords in GNOME keyring'
@@ -28,12 +28,14 @@
         chromium-launcher-$_launcher_ver.tar.gz::https://github.com/foutrelis/chromium-launcher/archive/v$_launcher_ver.tar.gz
         chromium.desktop
         chromium-widevine.patch
-        PNGImageDecoder.patch)
+        PNGImageDecoder.patch
+        gtk3-fix.patch)
 sha256sums=('a7de6015df9cf685d68efd1e070ae9c706c723cd9395d079a7d43672a2c37eb4'
             '8b01fb4efe58146279858a754d90b49e5a38c9a0b36a1f84cbb7d12f92b84c28'
             '028a748a5c275de9b8f776f97909f999a8583a4b77fd1cd600b4fc5c0c3e91e9'
             'd6fdcb922e5a7fbe15759d39ccc8ea4225821c44d98054ce0f23f9d1f00c9808'
-            'd9fd982ba6d50edb7743db6122b975ad1d3da5a9ad907c8ab7cf574395b186cd')
+            'd9fd982ba6d50edb7743db6122b975ad1d3da5a9ad907c8ab7cf574395b186cd'
+            'aa22e99d559a8c441f4ba21e4916671428326d92cf2f429c5226840ef4ea0892')
 
 # Google API keys (see http://www.chromium.org/developers/how-tos/api-keys)
 # Note: These are for Arch Linux use ONLY. For your own distribution, please
@@ -67,6 +69,9 @@
   # Chromium 51 won't build without this patch. Not reported upstream yet AFAIK.
   patch -p1 -i "$srcdir"/PNGImageDecoder.patch
 
+  # Fix gtk3 theme integration
+  patch -p1 -i "$srcdir"/gtk3-fix.patch
+
   # Commentception – use bundled ICU due to build failures (50.0.2661.75)
   # See https://crbug.com/584920 and https://crbug.com/592268
   # ---
@@ -92,7 +97,7 @@
 build() {
   cd "$srcdir/chromium-launcher-$_launcher_ver"
 
-  make PREFIX=/usr
+  make PREFIX=/usr GTK=3
 
   cd "$srcdir/$pkgname-$pkgver"
 
@@ -148,6 +153,7 @@
     -Duse_mojo=0
     -Duse_gconf=0
     -Duse_sysroot=0
+    -Duse_gtk3=1
     -Denable_hangout_services_extension=1
     -Denable_widevine=1
     -Ddisable_fatal_linker_warnings=1