diff --git a/booru_viewer/gui/app.py b/booru_viewer/gui/app.py
index 6f504e1..d4b86c8 100644
--- a/booru_viewer/gui/app.py
+++ b/booru_viewer/gui/app.py
@@ -1810,14 +1810,27 @@ def run() -> None:
             app.setStyle("Fusion")
             css_text = custom_css.read_text()
             app.setStyleSheet(css_text)
-            # Extract selection color from QSS and apply to palette
+            # Extract colors from QSS and apply to palette for Fusion
             import re
+            from PySide6.QtGui import QPalette, QColor
+            pal = app.palette()
             m = re.search(r'selection-background-color\s*:\s*(#[0-9a-fA-F]{3,8})', css_text)
             if m:
-                from PySide6.QtGui import QPalette, QColor
-                pal = app.palette()
                 pal.setColor(QPalette.ColorRole.Highlight, QColor(m.group(1)))
-                app.setPalette(pal)
+            # Set text color for spinbox/combobox arrows
+            m = re.search(r'QWidget\s*\{[^}]*?(?:^|\s)color\s*:\s*(#[0-9a-fA-F]{3,8})', css_text, re.MULTILINE)
+            if m:
+                text_color = QColor(m.group(1))
+                pal.setColor(QPalette.ColorRole.ButtonText, text_color)
+                pal.setColor(QPalette.ColorRole.WindowText, text_color)
+                pal.setColor(QPalette.ColorRole.Text, text_color)
+            m = re.search(r'QWidget\s*\{[^}]*?background-color\s*:\s*(#[0-9a-fA-F]{3,8})', css_text, re.MULTILINE)
+            if m:
+                bg_color = QColor(m.group(1))
+                pal.setColor(QPalette.ColorRole.Window, bg_color)
+                pal.setColor(QPalette.ColorRole.Base, bg_color)
+                pal.setColor(QPalette.ColorRole.Button, bg_color.lighter(120))
+            app.setPalette(pal)
         except Exception as e:
             log.warning(f"Operation failed: {e}")
 
diff --git a/themes/catppuccin-mocha.qss b/themes/catppuccin-mocha.qss
index bb45467..00ae173 100644
--- a/themes/catppuccin-mocha.qss
+++ b/themes/catppuccin-mocha.qss
@@ -117,12 +117,3 @@ QTabBar::tab:selected {
     background: #45475a;
     color: #cba6f7;
 }
-
-QSpinBox::up-button, QSpinBox::down-button {
-    background: #313244;
-    border: 1px solid #45475a;
-    width: 16px;
-}
-QSpinBox::up-button:hover, QSpinBox::down-button:hover {
-    background: #45475a;
-}
diff --git a/themes/everforest.qss b/themes/everforest.qss
index 71b0a93..aa0aba7 100644
--- a/themes/everforest.qss
+++ b/themes/everforest.qss
@@ -114,12 +114,3 @@ QTabBar::tab:selected {
     background: #4f585e;
     color: #a7c080;
 }
-
-QSpinBox::up-button, QSpinBox::down-button {
-    background: #343f44;
-    border: 1px solid #4f585e;
-    width: 16px;
-}
-QSpinBox::up-button:hover, QSpinBox::down-button:hover {
-    background: #4f585e;
-}
diff --git a/themes/gruvbox.qss b/themes/gruvbox.qss
index 483491c..6ad7576 100644
--- a/themes/gruvbox.qss
+++ b/themes/gruvbox.qss
@@ -114,12 +114,3 @@ QTabBar::tab:selected {
     background: #504945;
     color: #fe8019;
 }
-
-QSpinBox::up-button, QSpinBox::down-button {
-    background: #3c3836;
-    border: 1px solid #504945;
-    width: 16px;
-}
-QSpinBox::up-button:hover, QSpinBox::down-button:hover {
-    background: #504945;
-}
diff --git a/themes/nord.qss b/themes/nord.qss
index fa3d2f7..6a9823c 100644
--- a/themes/nord.qss
+++ b/themes/nord.qss
@@ -117,12 +117,3 @@ QTabBar::tab:selected {
     color: #88c0d0;
     border-bottom-color: #88c0d0;
 }
-
-QSpinBox::up-button, QSpinBox::down-button {
-    background: #3b4252;
-    border: 1px solid #4c566a;
-    width: 16px;
-}
-QSpinBox::up-button:hover, QSpinBox::down-button:hover {
-    background: #434c5e;
-}
diff --git a/themes/solarized-dark.qss b/themes/solarized-dark.qss
index 3cdff77..2ba246a 100644
--- a/themes/solarized-dark.qss
+++ b/themes/solarized-dark.qss
@@ -114,12 +114,3 @@ QTabBar::tab:selected {
     background: #586e75;
     color: #fdf6e3;
 }
-
-QSpinBox::up-button, QSpinBox::down-button {
-    background: #073642;
-    border: 1px solid #586e75;
-    width: 16px;
-}
-QSpinBox::up-button:hover, QSpinBox::down-button:hover {
-    background: #586e75;
-}
diff --git a/themes/tokyo-night.qss b/themes/tokyo-night.qss
index ed9e246..5ed7858 100644
--- a/themes/tokyo-night.qss
+++ b/themes/tokyo-night.qss
@@ -114,12 +114,3 @@ QTabBar::tab:selected {
     background: #3b4261;
     color: #7aa2f7;
 }
-
-QSpinBox::up-button, QSpinBox::down-button {
-    background: #24283b;
-    border: 1px solid #3b4261;
-    width: 16px;
-}
-QSpinBox::up-button:hover, QSpinBox::down-button:hover {
-    background: #3b4261;
-}