diff --git a/novelwriter/constants.py b/novelwriter/constants.py
index cdb05546..701ac5a1 100644
--- a/novelwriter/constants.py
+++ b/novelwriter/constants.py
@@ -447,7 +447,6 @@ class nwLabels:
         "Custom": (-1.0, -1.0),
     }
     THEME_COLORS: Final[dict[str, str]] = {
-        "theme":   QT_TRANSLATE_NOOP("Constant", "Theme Colours"),
         "default": QT_TRANSLATE_NOOP("Constant", "Foreground Colour"),
         "base":    QT_TRANSLATE_NOOP("Constant", "Background Colour"),
         "faded":   QT_TRANSLATE_NOOP("Constant", "Faded Colour"),
diff --git a/novelwriter/dialogs/preferences.py b/novelwriter/dialogs/preferences.py
index 3d284c2e..1a8645b3 100644
--- a/novelwriter/dialogs/preferences.py
+++ b/novelwriter/dialogs/preferences.py
@@ -294,6 +294,7 @@ class GuiPreferences(NDialog):
         # Tree Icon Colours
         self.iconColTree = NComboBox(self)
         self.iconColTree.setMinimumWidth(200)
+        self.iconColTree.addItem(self.tr("Theme Colours"), DEF_TREECOL)
         for key, label in nwLabels.THEME_COLORS.items():
             self.iconColTree.addItem(trConst(label), key)
         self.iconColTree.setCurrentData(CONFIG.iconColTree, DEF_TREECOL)
diff --git a/tests/test_dialogs/test_dlg_preferences.py b/tests/test_dialogs/test_dlg_preferences.py
index 9add0573..a017585f 100644
--- a/tests/test_dialogs/test_dlg_preferences.py
+++ b/tests/test_dialogs/test_dlg_preferences.py
@@ -27,7 +27,7 @@ from PyQt6.QtGui import QAction, QFont, QFontDatabase, QKeyEvent
 from PyQt6.QtWidgets import QFileDialog, QFontDialog
 
 from novelwriter import CONFIG, SHARED
-from novelwriter.config import DEF_GUI_DARK, DEF_GUI_LIGHT
+from novelwriter.config import DEF_GUI_DARK, DEF_GUI_LIGHT, DEF_TREECOL
 from novelwriter.constants import nwUnicode
 from novelwriter.dialogs.preferences import GuiPreferences
 from novelwriter.dialogs.quotes import GuiQuoteSelect
@@ -198,7 +198,7 @@ def testDlgPreferences_Settings(qtbot, monkeypatch, nwGUI, fncPath, tstPaths):
     prefs.iconColDocs.setChecked(True)
     prefs.emphLabels.setChecked(True)
 
-    assert CONFIG.iconColTree == "theme"
+    assert CONFIG.iconColTree == DEF_TREECOL
     assert CONFIG.iconColDocs is False
     assert CONFIG.emphLabels is False