diff --git a/src/calibre/gui2/__init__.py b/src/calibre/gui2/__init__.py
index 875c64ec0a..83ed03d7b6 100644
--- a/src/calibre/gui2/__init__.py
+++ b/src/calibre/gui2/__init__.py
@@ -23,8 +23,9 @@ from threading import Lock, RLock
 import calibre.gui2.pyqt6_compat as pqc
 from calibre import as_unicode, prints
 from calibre.constants import (
-    DEBUG, __appname__ as APP_UID, __version__, config_dir, is_running_from_develop,
-    isbsd, isfrozen, islinux, ismacos, iswindows, isxp, numeric_version, plugins_loc
+    DEBUG, __appname__ as APP_UID, __version__, builtin_colors_dark,
+    builtin_colors_light, config_dir, is_running_from_develop, isbsd, isfrozen,
+    islinux, ismacos, iswindows, isxp, numeric_version, plugins_loc
 )
 from calibre.ebooks.metadata import MetaInformation
 from calibre.gui2.linux_file_dialogs import (
@@ -1200,6 +1201,10 @@ class Application(QApplication):
     def is_dark_theme(self):
         return self.palette_manager.is_dark_theme
 
+    @property
+    def emphasis_window_background_color(self):
+        return (builtin_colors_dark if self.is_dark_theme else builtin_colors_light)['yellow']
+
     @pyqtSlot(int, result=QIcon)
     def get_qt_standard_icon(self, standard_pixmap):
         return self.palette_manager.get_qt_standard_icon(standard_pixmap)
diff --git a/src/calibre/gui2/dialogs/select_formats.py b/src/calibre/gui2/dialogs/select_formats.py
index 8104a6abce..a17ae49995 100644
--- a/src/calibre/gui2/dialogs/select_formats.py
+++ b/src/calibre/gui2/dialogs/select_formats.py
@@ -62,11 +62,7 @@ class SelectFormats(QDialog):
         self.fview.doubleClicked.connect(self.double_clicked,
                 type=Qt.ConnectionType.QueuedConnection)
         if exclude:
-            if QApplication.instance().is_dark_theme:
-                sheet = 'background-color: #DAA520; color: black'
-            else:
-                sheet = 'background-color: #fae7b5'
-            self.fview.setStyleSheet('QListView { %s }' % sheet)
+            self.fview.setStyleSheet(f'QListView {{ background-color: {QApplication.instance().emphasis_window_background_color} }}')
         self._l.addWidget(self.fview)
         self.fview.setModel(self.formats)
         self.fview.setSelectionMode(QAbstractItemView.SelectionMode.SingleSelection if single else
diff --git a/src/calibre/gui2/preferences/server.py b/src/calibre/gui2/preferences/server.py
index 04dde60d6f..5323c4ccec 100644
--- a/src/calibre/gui2/preferences/server.py
+++ b/src/calibre/gui2/preferences/server.py
@@ -8,12 +8,11 @@ import os
 import sys
 import textwrap
 import time
-
 from qt.core import (
-    QCheckBox, QComboBox, QDialog, QDialogButtonBox, QDoubleSpinBox, QFormLayout,
-    QFrame, QHBoxLayout, QIcon, QLabel, QLineEdit, QListWidget, QPlainTextEdit, QLayout,
-    QPushButton, QScrollArea, QSize, QSizePolicy, QSpinBox, Qt, QTabWidget, QTimer,
-    QToolButton, QUrl, QVBoxLayout, QWidget, pyqtSignal, sip
+    QApplication, QCheckBox, QComboBox, QDialog, QDialogButtonBox, QDoubleSpinBox,
+    QFormLayout, QFrame, QHBoxLayout, QIcon, QLabel, QLayout, QLineEdit, QListWidget,
+    QPlainTextEdit, QPushButton, QScrollArea, QSize, QSizePolicy, QSpinBox, Qt,
+    QTabWidget, QTimer, QToolButton, QUrl, QVBoxLayout, QWidget, pyqtSignal, sip
 )
 
 from calibre import as_unicode
@@ -26,8 +25,8 @@ from calibre.gui2.preferences import AbortCommit, ConfigWidgetBase, test_widget
 from calibre.gui2.widgets import HistoryLineEdit
 from calibre.srv.code import custom_list_template as default_custom_list_template
 from calibre.srv.embedded import custom_list_template, search_the_net_urls
-from calibre.srv.loop import parse_trusted_ips
 from calibre.srv.library_broker import load_gui_libraries
+from calibre.srv.loop import parse_trusted_ips
 from calibre.srv.opts import change_settings, options, server_config
 from calibre.srv.users import (
     UserManager, create_user_data, validate_password, validate_username
@@ -36,7 +35,6 @@ from calibre.utils.icu import primary_sort_key
 from calibre.utils.shared_file import share_open
 from polyglot.builtins import as_bytes
 
-
 if iswindows and not isportable:
     from calibre_extensions import winutil
 
@@ -698,7 +696,7 @@ class ChangeRestriction(QDialog):
             else:
                 m = _('{} is allowed access to all libraries, <b>except</b> those'
                       ' whose names match one of the names specified below.')
-                sheet += 'QWidget#libraries { background-color: #FAE7B5}'
+                sheet += f'QWidget#libraries {{ background-color: {QApplication.instance().emphasis_window_background_color} }}'
             self.libraries.setEnabled(True), self.la.setEnabled(True)
             self.items = self.items
         self.msg.setText(m.format(self.username))