diff --git a/application/CMakeLists.txt b/application/CMakeLists.txt
index b681f3fd..59a51ce7 100644
--- a/application/CMakeLists.txt
+++ b/application/CMakeLists.txt
@@ -106,6 +106,13 @@ SET(MULTIMC_SOURCES
 	InstanceWindow.h
 	InstanceWindow.cpp
 
+	# GUI - themes
+	themes/DarkTheme.cpp
+	themes/DarkTheme.h
+	themes/ITheme.h
+	themes/SystemTheme.cpp
+	themes/SystemTheme.h
+
 	# GUI - settings-specific wrappers for paged dialog
 	SettingsUI.h
 
diff --git a/application/MultiMC.cpp b/application/MultiMC.cpp
index f53d05e1..093d03b4 100644
--- a/application/MultiMC.cpp
+++ b/application/MultiMC.cpp
@@ -9,6 +9,10 @@
 #include "pages/global/AccountListPage.h"
 #include "pages/global/PasteEEPage.h"
 
+#include "themes/ITheme.h"
+#include "themes/SystemTheme.h"
+#include "themes/DarkTheme.h"
+
 #include <iostream>
 #include <QDir>
 #include <QFileInfo>
@@ -241,6 +245,9 @@ MultiMC::MultiMC(int &argc, char **argv, bool test_mode) : QApplication(argc, ar
 	// load icons
 	initIcons();
 
+	// load themes
+	initThemes();
+
 	// and instances
 	auto InstDirSetting = m_settings->getSetting("InstanceDir");
 	// instance path: check for problems with '!' in instance path and warn the user in the log
@@ -442,7 +449,10 @@ void MultiMC::initGlobalSettings(bool test_mode)
 	// Updates
 	m_settings->registerSetting("UpdateChannel", BuildConfig.VERSION_CHANNEL);
 	m_settings->registerSetting("AutoUpdate", true);
+
+	// Theming
 	m_settings->registerSetting("IconTheme", QString("multimc"));
+	m_settings->registerSetting("ApplicationTheme", QString("system"));
 
 	// Notifications
 	m_settings->registerSetting("ShownNotifications", QString());
@@ -943,6 +953,45 @@ FAILED:
 	QMessageBox::critical(nullptr, tr("Update failed!"), msg);
 }
 
+std::vector<ITheme *> MultiMC::getValidApplicationThemes()
+{
+	std::vector<ITheme *> ret;
+	auto iter = m_themes.cbegin();
+	while (iter != m_themes.cend())
+	{
+		ret.push_back((*iter).second.get());
+		iter++;
+	}
+	return ret;
+}
+
+void MultiMC::initThemes()
+{
+	auto insertTheme = [this](ITheme * theme)
+	{
+		m_themes.insert(std::make_pair(theme->id(), std::unique_ptr<ITheme>(theme)));
+	};
+	insertTheme(new SystemTheme());
+	insertTheme(new DarkTheme());
+}
+
+void MultiMC::setApplicationTheme(const QString& name)
+{
+	auto systemPalette = qApp->palette();
+	auto themeIter = m_themes.find(name);
+	if(themeIter != m_themes.end())
+	{
+		auto & theme = (*themeIter).second;
+		setPalette(theme->colorScheme());
+		setStyleSheet(theme->appStyleSheet());
+		//setStyle(QStyleFactory::create("Fusion"));
+	}
+	else
+	{
+		qWarning() << "Tried to set invalid theme:" << name;
+	}
+}
+
 void MultiMC::setIconTheme(const QString& name)
 {
 	XdgIcon::setThemeName(name);
diff --git a/application/MultiMC.h b/application/MultiMC.h
index 887f9c2d..3b8751c1 100644
--- a/application/MultiMC.h
+++ b/application/MultiMC.h
@@ -25,6 +25,7 @@ class UpdateChecker;
 class BaseProfilerFactory;
 class BaseDetachedToolFactory;
 class TranslationDownloader;
+class ITheme;
 
 #if defined(MMC)
 #undef MMC
@@ -69,6 +70,9 @@ public:
 
 	void setIconTheme(const QString& name);
 
+	std::vector<ITheme *> getValidApplicationThemes();
+	void setApplicationTheme(const QString& name);
+
 	// DownloadUpdateTask
 	std::shared_ptr<UpdateChecker> updateChecker()
 	{
@@ -145,6 +149,7 @@ private slots:
 private:
 	void initLogger();
 	void initIcons();
+	void initThemes();
 	void initGlobalSettings(bool test_mode);
 	void initTranslations();
 	void initSSL();
@@ -169,6 +174,7 @@ private:
 	std::shared_ptr<JavaInstallList> m_javalist;
 	std::shared_ptr<TranslationDownloader> m_translationChecker;
 	std::shared_ptr<GenericPageProvider> m_globalSettingsProvider;
+	std::map<QString, std::unique_ptr<ITheme>> m_themes;
 
 	QMap<QString, std::shared_ptr<BaseProfilerFactory>> m_profilers;
 	QMap<QString, std::shared_ptr<BaseDetachedToolFactory>> m_tools;
diff --git a/application/main.cpp b/application/main.cpp
index a996ef3b..f22cd732 100644
--- a/application/main.cpp
+++ b/application/main.cpp
@@ -28,6 +28,8 @@ int launchInstance(MultiMC &app, InstancePtr inst)
 int main_gui(MultiMC &app)
 {
 	app.setIconTheme(MMC->settings()->get("IconTheme").toString());
+	app.setApplicationTheme(MMC->settings()->get("ApplicationTheme").toString());
+
 	// show main window
 	auto inst = app.instances()->getInstanceById(app.launchId);
 	if(inst)
diff --git a/application/pages/global/MultiMCPage.cpp b/application/pages/global/MultiMCPage.cpp
index c1a24a56..9694fab5 100644
--- a/application/pages/global/MultiMCPage.cpp
+++ b/application/pages/global/MultiMCPage.cpp
@@ -28,6 +28,7 @@
 #include <FileSystem.h>
 #include "MultiMC.h"
 #include "BuildConfig.h"
+#include "themes/ITheme.h"
 
 // FIXME: possibly move elsewhere
 enum InstSortMode
@@ -305,6 +306,14 @@ void MultiMCPage::applySettings()
 		MMC->setIconTheme(s->get("IconTheme").toString());
 	}
 
+	auto originalAppTheme = s->get("ApplicationTheme").toString();
+	auto newAppTheme = ui->themeComboBoxColors->currentData().toString();
+	if(originalAppTheme != newAppTheme)
+	{
+		s->set("ApplicationTheme", newAppTheme);
+		MMC->setApplicationTheme(newAppTheme);
+	}
+
 	// Console settings
 	s->set("ShowConsole", ui->showConsoleCheck->isChecked());
 	s->set("AutoCloseConsole", ui->autoCloseConsoleCheck->isChecked());
@@ -386,6 +395,21 @@ void MultiMCPage::loadSettings()
 		ui->themeComboBox->setCurrentIndex(0);
 	}
 
+	{
+		auto currentTheme = s->get("ApplicationTheme").toString();
+		auto themes = MMC->getValidApplicationThemes();
+		int idx = 0;
+		for(auto &theme: themes)
+		{
+			ui->themeComboBoxColors->addItem(theme->name(), theme->id());
+			if(currentTheme == theme->id())
+			{
+				ui->themeComboBoxColors->setCurrentIndex(idx);
+			}
+			idx++;
+		}
+	}
+
 	// Console settings
 	ui->showConsoleCheck->setChecked(s->get("ShowConsole").toBool());
 	ui->autoCloseConsoleCheck->setChecked(s->get("AutoCloseConsole").toBool());
diff --git a/application/pages/global/MultiMCPage.ui b/application/pages/global/MultiMCPage.ui
index 943b30ac..2d6f45f0 100644
--- a/application/pages/global/MultiMCPage.ui
+++ b/application/pages/global/MultiMCPage.ui
@@ -329,13 +329,23 @@
        <item>
         <widget class="QGroupBox" name="themeBox">
          <property name="title">
-          <string>Icon Theme</string>
+          <string>Theme</string>
          </property>
-         <layout class="QHBoxLayout" name="themeBoxLayout">
-          <item>
+         <layout class="QFormLayout" name="formLayout">
+          <item row="0" column="0">
+           <widget class="QLabel" name="label_3">
+            <property name="text">
+             <string>&amp;Icons</string>
+            </property>
+            <property name="buddy">
+             <cstring>themeComboBox</cstring>
+            </property>
+           </widget>
+          </item>
+          <item row="0" column="1">
            <widget class="QComboBox" name="themeComboBox">
             <property name="sizePolicy">
-             <sizepolicy hsizetype="Minimum" vsizetype="Fixed">
+             <sizepolicy hsizetype="Expanding" vsizetype="Fixed">
               <horstretch>0</horstretch>
               <verstretch>0</verstretch>
              </sizepolicy>
@@ -380,6 +390,29 @@
             </item>
            </widget>
           </item>
+          <item row="1" column="1">
+           <widget class="QComboBox" name="themeComboBoxColors">
+            <property name="sizePolicy">
+             <sizepolicy hsizetype="Expanding" vsizetype="Fixed">
+              <horstretch>0</horstretch>
+              <verstretch>0</verstretch>
+             </sizepolicy>
+            </property>
+            <property name="focusPolicy">
+             <enum>Qt::StrongFocus</enum>
+            </property>
+           </widget>
+          </item>
+          <item row="1" column="0">
+           <widget class="QLabel" name="label_4">
+            <property name="text">
+             <string>Colors</string>
+            </property>
+            <property name="buddy">
+             <cstring>themeComboBoxColors</cstring>
+            </property>
+           </widget>
+          </item>
          </layout>
         </widget>
        </item>
@@ -552,6 +585,7 @@
   <tabstop>sortByNameBtn</tabstop>
   <tabstop>languageBox</tabstop>
   <tabstop>themeComboBox</tabstop>
+  <tabstop>themeComboBoxColors</tabstop>
   <tabstop>showConsoleCheck</tabstop>
   <tabstop>autoCloseConsoleCheck</tabstop>
   <tabstop>lineLimitSpinBox</tabstop>
diff --git a/application/themes/DarkTheme.cpp b/application/themes/DarkTheme.cpp
new file mode 100644
index 00000000..7445dedf
--- /dev/null
+++ b/application/themes/DarkTheme.cpp
@@ -0,0 +1,37 @@
+#include "DarkTheme.h"
+
+QString DarkTheme::id()
+{
+	return "dark";
+}
+
+QString DarkTheme::name()
+{
+	return QObject::tr("Dark");
+}
+
+QPalette DarkTheme::colorScheme()
+{
+	QPalette darkPalette;
+	darkPalette.setColor(QPalette::Window, QColor(49,54,59));
+	darkPalette.setColor(QPalette::WindowText, Qt::white);
+	darkPalette.setColor(QPalette::Base, QColor(35,38,41));
+	darkPalette.setColor(QPalette::AlternateBase, QColor(49,54,59));
+	darkPalette.setColor(QPalette::ToolTipBase, Qt::white);
+	darkPalette.setColor(QPalette::ToolTipText, Qt::white);
+	darkPalette.setColor(QPalette::Text, Qt::white);
+	darkPalette.setColor(QPalette::Button, QColor(49,54,59));
+	darkPalette.setColor(QPalette::ButtonText, Qt::white);
+	darkPalette.setColor(QPalette::BrightText, Qt::red);
+	darkPalette.setColor(QPalette::Link, QColor(42, 130, 218));
+
+	darkPalette.setColor(QPalette::Highlight, QColor(42, 130, 218));
+	darkPalette.setColor(QPalette::HighlightedText, Qt::black);
+	return darkPalette;
+}
+
+
+QString DarkTheme::appStyleSheet()
+{
+	return "QToolTip { color: #ffffff; background-color: #2a82da; border: 1px solid white; }";
+}
diff --git a/application/themes/DarkTheme.h b/application/themes/DarkTheme.h
new file mode 100644
index 00000000..11e621a6
--- /dev/null
+++ b/application/themes/DarkTheme.h
@@ -0,0 +1,14 @@
+#pragma once
+
+#include "ITheme.h"
+
+class DarkTheme: public ITheme
+{
+public:
+	virtual ~DarkTheme() {}
+
+	QString id() override;
+	QString name() override;
+	QString appStyleSheet() override;
+	QPalette colorScheme() override;
+};
diff --git a/application/themes/ITheme.h b/application/themes/ITheme.h
new file mode 100644
index 00000000..8e0836eb
--- /dev/null
+++ b/application/themes/ITheme.h
@@ -0,0 +1,13 @@
+#pragma once
+#include <QString>
+#include <QPalette>
+
+class ITheme
+{
+public:
+	virtual ~ITheme() {}
+	virtual QString id() = 0;
+	virtual QString name() = 0;
+	virtual QString appStyleSheet() = 0;
+	virtual QPalette colorScheme() = 0;
+};
diff --git a/application/themes/SystemTheme.cpp b/application/themes/SystemTheme.cpp
new file mode 100644
index 00000000..6ced6843
--- /dev/null
+++ b/application/themes/SystemTheme.cpp
@@ -0,0 +1,28 @@
+#include "SystemTheme.h"
+#include <QApplication>
+#include <QStyle>
+
+SystemTheme::SystemTheme()
+{
+	systemPalette = QApplication::style()->standardPalette();
+}
+
+QString SystemTheme::id()
+{
+	return "system";
+}
+
+QString SystemTheme::name()
+{
+	return QObject::tr("System");
+}
+
+QPalette SystemTheme::colorScheme()
+{
+	return systemPalette;
+}
+
+QString SystemTheme::appStyleSheet()
+{
+	return QString();
+}
diff --git a/application/themes/SystemTheme.h b/application/themes/SystemTheme.h
new file mode 100644
index 00000000..90fd8ed9
--- /dev/null
+++ b/application/themes/SystemTheme.h
@@ -0,0 +1,19 @@
+#pragma once
+
+#include "ITheme.h"
+
+class SystemTheme: public ITheme
+{
+public:
+	SystemTheme();
+	virtual ~SystemTheme() {}
+
+	QString id() override;
+	QString name() override;
+	QString appStyleSheet() override;
+	QPalette colorScheme() override;
+private:
+	QPalette systemPalette;
+	QString systemTheme;
+};
+