diff --git a/modules/plymouth/default.nix b/modules/plymouth/default.nix
index 69edaef..4156f8d 100644
--- a/modules/plymouth/default.nix
+++ b/modules/plymouth/default.nix
@@ -18,6 +18,13 @@ let
     cp ${config.lib.stylix.pixel "base01"} $themeDir/progress-bar.png
 
     cp ${./theme.script} $themeDir/stylix.script
+    substituteInPlace $themeDir/stylix.script \
+      --replace "%BASE00%" "${
+        if config.stylix.targets.plymouth.blackBackground
+        then "0, 0, 0"
+        else "${base00-dec-r}, ${base00-dec-g}, ${base00-dec-b}"
+      }" \
+      --replace "%BASE05%" "${base05-dec-r}, ${base05-dec-g}, ${base05-dec-b}"
 
     echo "
     [Plymouth Theme]
@@ -48,6 +55,18 @@ in {
         sha256 = "SCuQlSPB14GFTq4XvExJ0QEuK2VIbrd5YYKHLRG/q5I=";
       };
     };
+
+    blackBackground = mkOption {
+      description = ''
+        Whether to use a black background rather than a theme colour.
+
+        This looks good in combination with systemd-boot, as it means that the
+        background colour doesn't change throughout the boot process.
+      '';
+      type = types.bool;
+      defaultText = literalDocBook "<literal>true</literal> if systemd-boot is enabled";
+      default = config.boot.loader.systemd-boot.enable;
+    };
   };
 
   config.boot.plymouth = mkIf config.stylix.targets.plymouth.enable {
diff --git a/modules/plymouth/theme.script b/modules/plymouth/theme.script
index 820df2d..c50de95 100644
--- a/modules/plymouth/theme.script
+++ b/modules/plymouth/theme.script
@@ -3,6 +3,12 @@ center_y = Window.GetHeight() / 2;
 baseline_y = (Window.GetHeight() / 3) * 2;
 
 
+### BACKGROUND ###
+
+Window.SetBackgroundTopColor(%BASE00%);
+Window.SetBackgroundBottomColor(%BASE00%);
+
+
 ### LOGO ###
 
 logo.original_image = Image("logo.png");
@@ -60,13 +66,13 @@ Plymouth.SetBootProgressFunction(progress_callback);
 
 prompt = null;
 bullets = null;
-bullet.image = Image.Text("•", 1, 1, 1);
+bullet.image = Image.Text("•", %BASE05%);
 
 fun password_callback (prompt_text, bullet_count) {
   progress_background.sprite.SetOpacity(0);
   progress_bar.sprite.SetOpacity(0);
 
-  prompt.image = Image.Text("Enter password", 1, 1, 1);
+  prompt.image = Image.Text("Enter password", %BASE05%);
   prompt.sprite = Sprite(prompt.image);
   prompt.sprite.SetPosition(
     center_x - (prompt.image.GetWidth() / 2),