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diff --git a/src/quick/items/qquickpalettecolorprovider.cpp b/src/quick/items/qquickpalettecolorprovider.cpp
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+++ b/src/quick/items/qquickpalettecolorprovider.cpp
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+/****************************************************************************
+**
+** Copyright (C) 2020 The Qt Company Ltd.
+** Contact: http://www.qt.io/licensing/
+**
+** This file is part of the QtQuick module of the Qt Toolkit.
+**
+** $QT_BEGIN_LICENSE:LGPL$
+** Commercial License Usage
+** Licensees holding valid commercial Qt licenses may use this file in
+** accordance with the commercial license agreement provided with the
+** Software or, alternatively, in accordance with the terms contained in
+** a written agreement between you and The Qt Company. For licensing terms
+** and conditions see https://www.qt.io/terms-conditions. For further
+** information use the contact form at https://www.qt.io/contact-us.
+**
+** GNU Lesser General Public License Usage
+** Alternatively, this file may be used under the terms of the GNU Lesser
+** General Public License version 3 as published by the Free Software
+** Foundation and appearing in the file LICENSE.LGPL3 included in the
+** packaging of this file. Please review the following information to
+** ensure the GNU Lesser General Public License version 3 requirements
+** will be met: https://www.gnu.org/licenses/lgpl-3.0.html.
+**
+** GNU General Public License Usage
+** Alternatively, this file may be used under the terms of the GNU
+** General Public License version 2.0 or (at your option) the GNU General
+** Public license version 3 or any later version approved by the KDE Free
+** Qt Foundation. The licenses are as published by the Free Software
+** Foundation and appearing in the file LICENSE.GPL2 and LICENSE.GPL3
+** included in the packaging of this file. Please review the following
+** information to ensure the GNU General Public License requirements will
+** be met: https://www.gnu.org/licenses/gpl-2.0.html and
+** https://www.gnu.org/licenses/gpl-3.0.html.
+**
+** $QT_END_LICENSE$
+**
+****************************************************************************/
+#include "qquickpalettecolorprovider_p.h"
+
+#include <QtQuick/private/qquickabstractpaletteprovider_p.h>
+
+QT_BEGIN_NAMESPACE
+
+static bool notEq(const QPalette &p1, const QPalette &p2)
+{
+    return p1.resolve() != p2.resolve() || p1 != p2;
+}
+
+static QPalette::ColorGroup adjustCg(QPalette::ColorGroup group)
+{
+    return group == QPalette::All ? QPalette::Active : group;
+}
+
+class DefaultPalettesProvider : public QQuickAbstractPaletteProvider
+{
+public:
+    QPalette defaultPalette() const override { static QPalette p; return p; }
+    QPalette parentPalette() const override  { return defaultPalette();     }
+};
+
+static std::default_delete<const QQuickAbstractPaletteProvider> defaultDeleter() { return {}; }
+
+QQuickPaletteColorProvider::QQuickPaletteColorProvider()
+    : m_paletteProvider(ProviderPtr(new DefaultPalettesProvider, defaultDeleter()))
+{
+}
+
+const QColor &QQuickPaletteColorProvider::color(QPalette::ColorGroup group, QPalette::ColorRole role) const
+{
+    return m_resolvedPalette.color(adjustCg(group), role);
+}
+
+bool QQuickPaletteColorProvider::setColor(QPalette::ColorGroup g, QPalette::ColorRole r, QColor c)
+{
+    m_requestedPalette.value() = m_resolvedPalette;
+    m_requestedPalette->setColor(g, r, c);
+
+    return inheritPalette(paletteProvider()->parentPalette());
+}
+
+bool QQuickPaletteColorProvider::resetColor(QPalette::ColorGroup group, QPalette::ColorRole role)
+{
+    const auto &defaultPalette = paletteProvider()->defaultPalette() ;
+    const auto &defaultColor = defaultPalette.color(adjustCg(group), role);
+
+    return setColor(group, role, defaultColor);
+}
+
+bool QQuickPaletteColorProvider::fromQPalette(QPalette p)
+{
+    m_requestedPalette.value() = std::move(p);
+    return inheritPalette(paletteProvider()->parentPalette());
+}
+
+QPalette QQuickPaletteColorProvider::palette() const
+{
+    return m_resolvedPalette;
+}
+
+const QQuickAbstractPaletteProvider *QQuickPaletteColorProvider::paletteProvider() const
+{
+    Q_ASSERT(m_paletteProvider);
+    return m_paletteProvider.get();
+}
+
+void QQuickPaletteColorProvider::setPaletteProvider(const QQuickAbstractPaletteProvider *paletteProvider)
+{
+    static const auto emptyDeleter = [](auto &&){};
+    m_paletteProvider = ProviderPtr(paletteProvider, emptyDeleter);
+}
+
+bool QQuickPaletteColorProvider::copyColorGroup(QPalette::ColorGroup cg,
+                                                const QQuickPaletteColorProvider &p)
+{
+    m_requestedPalette.value() = m_resolvedPalette;
+
+    auto srcPalette = p.palette();
+    for (int roleIndex = QPalette::WindowText; roleIndex < QPalette::NColorRoles; ++roleIndex) {
+        const auto cr = QPalette::ColorRole(roleIndex);
+        if (srcPalette.isBrushSet(cg, cr)) {
+            m_requestedPalette->setBrush(cg, cr, srcPalette.brush(cg, cr));
+        }
+    }
+
+    return inheritPalette(paletteProvider()->parentPalette());
+}
+
+bool QQuickPaletteColorProvider::reset()
+{
+    return fromQPalette(QPalette());
+}
+
+bool QQuickPaletteColorProvider::inheritPalette(const QPalette &p)
+{
+    QPalette parentPalette = m_requestedPalette.isAllocated() ? m_requestedPalette->resolve(p) : p;
+    parentPalette.resolve(m_requestedPalette.isAllocated() ? m_requestedPalette->resolve() | p.resolve() : p.resolve());
+
+    auto tmpResolvedPalette = parentPalette.resolve(paletteProvider()->defaultPalette());
+
+    bool changed = notEq(tmpResolvedPalette, m_resolvedPalette);
+    if (changed) {
+        std::swap(tmpResolvedPalette, m_resolvedPalette);
+    }
+
+    return changed;
+}
+
+QT_END_NAMESPACE