diff --git a/tabulous/_qt/_preference/_shared.py b/tabulous/_qt/_preference/_shared.py
index fe9aaf64..faf81041 100644
--- a/tabulous/_qt/_preference/_shared.py
+++ b/tabulous/_qt/_preference/_shared.py
@@ -1,6 +1,7 @@
 from __future__ import annotations
 
 from qtpy import QtWidgets as QtW, QtGui, QtCore
+from tabulous._qt._qt_const import foreground_color_role
 
 
 class QTitleLabel(QtW.QLabel):
@@ -13,7 +14,7 @@ def __init__(self, text: str, size: int) -> None:
 
     def paintEvent(self, a0: QtGui.QPaintEvent) -> None:
         painter = QtGui.QPainter(self)
-        color = self.palette().color(QtGui.QPalette.ColorRole.Foreground)
+        color = foreground_color_role(self.palette())
         painter.setPen(QtGui.QPen(color, 1))
         bottom_left = self.rect().bottomLeft()
         bottom_right = QtCore.QPoint(bottom_left.x() + 300, bottom_left.y())
diff --git a/tabulous/_qt/_preference/_theme.py b/tabulous/_qt/_preference/_theme.py
index 0ae0e922..96367528 100644
--- a/tabulous/_qt/_preference/_theme.py
+++ b/tabulous/_qt/_preference/_theme.py
@@ -71,20 +71,24 @@ def paintEvent(self, a0: QtGui.QPaintEvent) -> None:
         painter = QtGui.QPainter(self)
         geo = self.rect()
 
-        grad = QtGui.QLinearGradient(geo.topLeft(), geo.bottomRight())
+        grad = QtGui.QLinearGradient(
+            QtCore.QPointF(geo.topLeft()), QtCore.QPointF(geo.bottomRight())
+        )
         grad.setColorAt(0, QtGui.QColor(self._style_theme.background0))
         grad.setColorAt(1, QtGui.QColor(self._style_theme.background1))
-        path = QtGui.QPainterPath(geo.topLeft())
-        path.lineTo(geo.topRight())
-        path.lineTo(geo.bottomLeft())
+        path = QtGui.QPainterPath(QtCore.QPointF(geo.topLeft()))
+        path.lineTo(QtCore.QPointF(geo.topRight()))
+        path.lineTo(QtCore.QPointF(geo.bottomLeft()))
         painter.fillPath(path, grad)
 
-        grad = QtGui.QLinearGradient(geo.topLeft(), geo.bottomRight())
+        grad = QtGui.QLinearGradient(
+            QtCore.QPointF(geo.topLeft()), QtCore.QPointF(geo.bottomRight())
+        )
         grad.setColorAt(0, QtGui.QColor(self._style_theme.highlight0))
         grad.setColorAt(1, QtGui.QColor(self._style_theme.highlight1))
-        path = QtGui.QPainterPath(geo.topRight())
-        path.lineTo(geo.bottomLeft())
-        path.lineTo(geo.bottomRight())
+        path = QtGui.QPainterPath(QtCore.QPointF(geo.topRight()))
+        path.lineTo(QtCore.QPointF(geo.bottomLeft()))
+        path.lineTo(QtCore.QPointF(geo.bottomRight()))
         painter.fillPath(path, grad)
 
         if self._checked:
diff --git a/tabulous/_qt/_qt_const.py b/tabulous/_qt/_qt_const.py
index b5a231f4..3ef83501 100644
--- a/tabulous/_qt/_qt_const.py
+++ b/tabulous/_qt/_qt_const.py
@@ -1,5 +1,6 @@
 import sys
 from pathlib import Path
+from qtpy import QtGui, QT6
 
 # Monospace font
 if sys.platform == "win32":
@@ -10,3 +11,23 @@
     MonospaceFontFamily = "Monospace"
 
 ICON_DIR = Path(__file__).parent / "_icons"
+
+if QT6:
+
+    def foreground_color_role(qpalette: QtGui.QPalette) -> QtGui.QColor:
+        return qpalette.color(
+            QtGui.QPalette.ColorGroup.Normal, QtGui.QPalette.ColorRole.Text
+        )
+
+    def background_color_role(qpalette: QtGui.QPalette) -> QtGui.QColor:
+        return qpalette.color(
+            QtGui.QPalette.ColorGroup.Normal, QtGui.QPalette.ColorRole.Base
+        )
+
+else:
+
+    def foreground_color_role(qpalette: QtGui.QPalette) -> QtGui.QColor:
+        return qpalette.color(QtGui.QPalette.ColorRole.Foreground)
+
+    def background_color_role(qpalette: QtGui.QPalette) -> QtGui.QColor:
+        return qpalette.color(QtGui.QPalette.ColorRole.Background)
diff --git a/tabulous/_qt/_table/_animation.py b/tabulous/_qt/_table/_animation.py
index f2239609..ca7cc73f 100644
--- a/tabulous/_qt/_table/_animation.py
+++ b/tabulous/_qt/_table/_animation.py
@@ -5,6 +5,7 @@
 from contextlib import contextmanager
 from tabulous._utils import get_config
 from tabulous._range import MultiRectRange, RectRange
+from tabulous._qt._qt_const import background_color_role
 
 from qtpy import QtCore, QtWidgets as QtW, QtGui
 
@@ -123,7 +124,7 @@ def get_brush(self, size: QtCore.QSize, time: float, bg) -> QtGui.QBrush:
         qtable = self._parent.parent()
         is_qvariant = not isinstance(bg, QtGui.QColor)
         if is_qvariant:
-            bg = qtable.palette().color(QtGui.QPalette.ColorRole.Background)
+            bg = background_color_role(qtable.palette())
         col = qtable._qtable_view.selectionColor
         length = max(size.width(), size.height())
         dh = 4 / length
diff --git a/tabulous/_qt/_table/_base/_enhanced_table.py b/tabulous/_qt/_table/_base/_enhanced_table.py
index 2e5199cf..6936380e 100644
--- a/tabulous/_qt/_table/_base/_enhanced_table.py
+++ b/tabulous/_qt/_table/_base/_enhanced_table.py
@@ -360,6 +360,8 @@ def mousePressEvent(self, e: QtGui.QMouseEvent) -> None:
 
     def mouseMoveEvent(self, e: QtGui.QMouseEvent) -> None:
         """Scroll table plane when mouse is moved with right click."""
+        if e.buttons() == Qt.MouseButton.NoButton:
+            return None
         if self._mouse_track.last_button == "right":
             pos = e.pos()
             dy = pos.y() - self._mouse_track.last_rightclick_pos.y()