diff --git a/src/qtquick/qml/private/MessageBoxSheet.qml b/src/qtquick/qml/private/MessageBoxSheet.qml
--- a/src/qtquick/qml/private/MessageBoxSheet.qml
+++ b/src/qtquick/qml/private/MessageBoxSheet.qml
@@ -43,6 +43,9 @@
         wrapMode: Text.Wrap
         readOnly: true
         selectByMouse: true
+        color: Kirigami.Theme.textColor
+        selectedTextColor: Kirigami.Theme.highlightedTextColor
+        selectionColor: Kirigami.Theme.highlightColor
     }
     footer: QtLayouts.RowLayout {
         Item { QtLayouts.Layout.fillWidth: true }