diff --git a/palette-generator/Stylix/Main.hs b/palette-generator/Stylix/Main.hs
index 28e4e1c..d85c16e 100644
--- a/palette-generator/Stylix/Main.hs
+++ b/palette-generator/Stylix/Main.hs
@@ -8,6 +8,13 @@ import System.Environment ( getArgs )
 import System.Exit ( die )
 import System.Random ( setStdGen, mkStdGen )
 import Text.JSON ( encode )
+import Text.Read (readMaybe)
+
+-- String to float
+stringToFloat :: String -> Float
+stringToFloat s = case readMaybe s of
+   Just x  -> x
+   Nothing -> error "Invalid float value"
 
 -- | Load an image file.
 loadImage :: String -- ^ Path to the file
@@ -22,7 +29,7 @@ mainProcess (polarity,primaryScaleDark,primaryScaleLight, input, output) = do
   setStdGen $ mkStdGen 0
 
   image <- loadImage input
-  palette <- evolve (polarity, primaryScaleDark,primaryScaleLight,convertRGB8 image)
+  palette <- evolve (polarity,stringToFloat primaryScaleDark,stringToFloat primaryScaleLight,convertRGB8 image)
   let outputTable = makeOutputTable $ V.map lab2rgb palette
 
   writeFile output $ encode outputTable
diff --git a/palette-generator/Stylix/Palette.hs b/palette-generator/Stylix/Palette.hs
index ebd50fe..1f9f568 100644
--- a/palette-generator/Stylix/Palette.hs
+++ b/palette-generator/Stylix/Palette.hs
@@ -34,7 +34,7 @@ randomFromImage image = do
       color = RGB (fromIntegral r) (fromIntegral g) (fromIntegral b)
   return $ rgb2lab color
 
-instance Species (String,String,String, Image PixelRGB8) (V.Vector LAB) where
+instance Species (String,Float,Float, Image PixelRGB8) (V.Vector LAB) where
   generate (_,_,_, image) = V.replicateM 16 $ randomFromImage image
 
   crossover _ a b = return $ alternatingZip a b
@@ -84,15 +84,31 @@ instance Species (String,String,String, Image PixelRGB8) (V.Vector LAB) where
         lightScheme
           = lightnessError (V.fromList [90, 70, 55, 35, 25, 10, 5, 5]) 40
 
+        // 0.2, 0.133,0.178,0.85,0.93,0.88,1.0,1.0 for 0.1 scale
+        // f(x) = ax+b for multiplier (light)
+        // 0.889, 0.111
+        // 0.963, 0.037
+        // 0.913, 0.087
+        // 0.167, 0.833
+        // 0.078, 0.922
+        // 0.133, 0.087
+        // 0.0, 1.0
+        // 0.0, 1.0
+
         {-
         For dark themes, the background is dark and the text is bright.
         The accent colours are slightly brighter.
         -}
         darkScheme
           = lightnessError (V.fromList [10, 30, 45, 65, 75, 90, 95, 95]) 60
-
-        darkerScheme
-          = lightnessError (V.fromList [5, 10, 15, 60, 70, 80, 95, 95]) 60
-
-        evenDarkerScheme
-          = lightnessError (V.fromList [2, 4, 8, 55, 70, 80, 95, 95]) 60
+        
+        // 0.2, 0.133,0.178,0.85,0.93,0.88,1.0,1.0 for 0.1 scale
+        // f(x) = ax+b for multiplier (dark)
+        // 0.889, 0.111
+        // 0.963, 0.037
+        // 0.913, 0.087
+        // 0.167, 0.833
+        // 0.078, 0.922
+        // 0.133, 0.087
+        // 0.0, 1.0
+        // 0.0, 1.0