diff --git a/README.md b/README.md
index 6f5557c..59b7dd6 100644
--- a/README.md
+++ b/README.md
@@ -19,4 +19,3 @@
 - Fix kitty bell disable not working
 - Add Gruvbox switching support
   - kitty theme is "Gruvbox Dark", [see the full list](https://github.com/kovidgoyal/kitty-themes/blob/master/themes.json).
-- Somehow remove redundant color definitions in [`hosts/elnupad/polybar.nix`](hosts/elnupad/polybar.nix)
diff --git a/hosts/elnupad/polybar.nix b/hosts/elnupad/polybar.nix
index ac6f18b..4c5b799 100644
--- a/hosts/elnupad/polybar.nix
+++ b/hosts/elnupad/polybar.nix
@@ -1,13 +1,7 @@
 { pkgs, lib, ... }:
 
 let
-  # TODO: eliminate redundant color definitions
-  background = "#2e3440";
-  background-alt = "#3b4252";
-  foreground = "#eceff4";
-  primary = "#8fbcbb";
-  alert = "#bf616a";
-  disabled = "#434c5e";
+  colors = import ../../polybar/colors.nix;
 in
 {
   home.packages = with pkgs; [ lm_sensors ];
@@ -26,12 +20,12 @@ in
 
       format-low = "<animation-low> <label-low>";
 
-      label-charging = "%{F${primary}}AC%{F-} %percentage%%";
-      label-discharging = "%{F${primary}}BAT%{F-} %percentage%%";
-      label-full = "%{F${primary}}AC%{F-}";
+      label-charging = "%{F${colors.primary}}AC%{F-} %percentage%%";
+      label-discharging = "%{F${colors.primary}}BAT%{F-} %percentage%%";
+      label-full = "%{F${colors.primary}}AC%{F-}";
 
-      animation-low-0 = "%{F${primary}}BAT%{F-}";
-      animation-low-1 = "%{F${alert}}LOW%{F-}";
+      animation-low-0 = "%{F${colors.primary}}BAT%{F-}";
+      animation-low-1 = "%{F${colors.alert}}LOW%{F-}";
 
       full-at = 96;
       low-at = 10; # default
diff --git a/polybar/colors.nix b/polybar/colors.nix
new file mode 100644
index 0000000..ed74183
--- /dev/null
+++ b/polybar/colors.nix
@@ -0,0 +1,8 @@
+{
+  background = "#2e3440";
+  background-alt = "#3b4252";
+  foreground = "#eceff4";
+  primary = "#8fbcbb";
+  alert = "#bf616a";
+  disabled = "#434c5e";
+}
diff --git a/polybar/default.nix b/polybar/default.nix
index 1872f01..d90171e 100644
--- a/polybar/default.nix
+++ b/polybar/default.nix
@@ -1,12 +1,7 @@
 { pkgs, lib, ... }:
 
 let
-  background = "#2e3440";
-  background-alt = "#3b4252";
-  foreground = "#eceff4";
-  primary = "#8fbcbb";
-  alert = "#bf616a";
-  disabled = "#434c5e";
+  colors = import ./colors.nix;
 in
 {
   # Dependencies
@@ -28,8 +23,8 @@ in
       "bar/top" = {
         font-0 = "Noto Sans Mono;2";
         font-1 = "Noto Sans CJK JP;2";
-        background = "${background}";
-        foreground = "${foreground}";
+        background = "${colors.background}";
+        foreground = "${colors.foreground}";
         width = "100%";
 
         height = "24pt";
@@ -37,7 +32,7 @@ in
         padding-right = 1;
         module-margin = 1;
         separator = "|";
-        separator-foreground = "${disabled}";
+        separator-foreground = "${colors.disabled}";
         cursor-click = "pointer";
         cursor-scroll = "ns-resize";
         modules-left = [
@@ -59,16 +54,16 @@ in
       "module/xworkspaces" = {
         type = "internal/xworkspaces";
         
-        label-active-background = "${background-alt}";
-        label-active-underline = "${primary}";
+        label-active-background = "${colors.background-alt}";
+        label-active-underline = "${colors.primary}";
         label-active-padding-right = 1;
 
         label-occupied-padding-right = 1;
 
-        label-urgent-background = "${alert}";
+        label-urgent-background = "${colors.alert}";
         label-urgent-padding-right = 1;
 
-        label-empty-foreground = "${disabled}";
+        label-empty-foreground = "${colors.disabled}";
         label-empty-padding-right = 1;
       };
       "module/xwindow" = {
@@ -98,16 +93,16 @@ in
 
         label-mounted = "%{F#88c0d0}%mountpoint%%{F-} %percentage_used%%";
         label-unmounted = "%mountpoint% not mounted";
-        label-unmounted-foreground = "${disabled}";
+        label-unmounted-foreground = "${colors.disabled}";
       };
       "module/pulseaudio" = {
         type = "internal/pulseaudio";
         
         format-volume-prefix = "VOL ";
-        format-volume-prefix-foreground = "${primary}";
+        format-volume-prefix-foreground = "${colors.primary}";
 
         label-muted = "muted";
-        label-muted-foreground = "${disabled}";
+        label-muted-foreground = "${colors.disabled}";
       };
       "module/memory" = {
         type = "internal/memory";
@@ -115,7 +110,7 @@ in
         interval = 2;
 
         format-prefix = "RAM ";
-        format-prefix-foreground = "${primary}";
+        format-prefix-foreground = "${colors.primary}";
       };
       "module/cpu" = {
         type = "internal/cpu";
@@ -123,7 +118,7 @@ in
         interval = 2;
         
         format-prefix = "CPU ";
-        format-prefix-foreground = "${primary}";
+        format-prefix-foreground = "${colors.primary}";
       };
       "module/date" = {
         type = "internal/date";
@@ -133,7 +128,7 @@ in
         date = "%H:%M";
         date-alt = "%Y-%m-%d %H:%M:%S";
 
-        label-foreground = "${primary}";
+        label-foreground = "${colors.primary}";
       };
     };
   };