diff --git a/stylix/colors.nix b/stylix/colors.nix
index e84a8438..ff05bea1 100644
--- a/stylix/colors.nix
+++ b/stylix/colors.nix
@@ -17,11 +17,29 @@ let
   };
   colorgramPython = pkgs.python3.withPackages (ps: [ colorgram ]);
 
-  # Pass the wallpaper to ./colors.py and return a JSON file containing the
-  # generated colorscheme
-  colorsJSON = pkgs.runCommand "stylix-colors" {}
-    "${colorgramPython}/bin/python ${./colors.py} ${cfg.image} > $out";
+  # Pass the wallpaper and any manually selected colors to ./colors.py and
+  # return a JSON file containing the generated colorscheme
+  colorsJSON = pkgs.runCommand
+    "stylix-colors"
+    {
+      colors = builtins.toJSON config.stylix.colors;
+      passAsFile = [ "colors" ];
+    }
+    ''
+      ${colorgramPython}/bin/python ${./colors.py} \
+        ${cfg.image} < $colorsPath > $out
+    '';
 
 in {
+  options.stylix.colors = genAttrs
+    [ "base00" "base01" "base02" "base03" "base04" "base05" "base06" "base07"
+      "base08" "base09" "base0A" "base0B" "base0C" "base0D" "base0E" "base0F" ]
+    (name: mkOption {
+      description = "Hexadecimal color value for ${name}.";
+      default = null;
+      defaultText = "Automatically selected from the background image.";
+      type = types.nullOr (types.strMatching "[0-9a-fA-F]{6}");
+    });
+
   config.lib.stylix.colors = importJSON colorsJSON;
 }
diff --git a/stylix/colors.py b/stylix/colors.py
index 8b1f7a3e..1ed37f5a 100644
--- a/stylix/colors.py
+++ b/stylix/colors.py
@@ -40,8 +40,8 @@ scheme = {}
 for i in range(8):
     scheme[int_to_base(i)] = (
         dominant_color.hsl.h,
-        dominant_color.hsl.s,
         scale(i),
+        dominant_color.hsl.s,
     )
 
 # base08 to base0A use the remaining 8 colors from the image,
@@ -51,19 +51,33 @@ for i in range(8, 16):
     color = colors[i-8]
     scheme[int_to_base(i)] = (
         color.hsl.h,
-        color.hsl.s,
         clamp(color.hsl.l),
+        color.hsl.s,
     )
 
+# Override with any manually selected colors
+manual_colors = json.load(sys.stdin)
+for k, v in manual_colors.items():
+    if v is not None:
+      scheme[k] = colorsys.rgb_to_hls(
+          int(v[0:2], 16) / 255,
+          int(v[2:4], 16) / 255,
+          int(v[4:6], 16) / 255,
+      )
+      scheme[k] = (
+          scheme[k][0] * 255,
+          scheme[k][1] * 255,
+          scheme[k][2] * 255,
+      )
+
 
 data = {}
 
 for key, color in scheme.items():
     r, g, b = colorsys.hls_to_rgb(
-        # Function wants HLS, stored as HSL
         color[0] / 255,
-        color[2] / 255,
         color[1] / 255,
+        color[2] / 255,
     )
     data[key + "-dec-r"] = r
     data[key + "-dec-g"] = g