diff --git a/colorhash.cabal b/colorhash.cabal
--- a/colorhash.cabal
+++ b/colorhash.cabal
@@ -1,7 +1,7 @@
 cabal-version:       2.2
 
 name:                colorhash
-version:             0.2.0.0
+version:             0.2.1.0
 synopsis: Generate a color for a hashable object.
 -- description:
 homepage:            https://github.com/hapytex/colorhash#readme
diff --git a/src/Data/Hashable/Color.hs b/src/Data/Hashable/Color.hs
--- a/src/Data/Hashable/Color.hs
+++ b/src/Data/Hashable/Color.hs
@@ -55,7 +55,7 @@
 
 _altColor :: Col8 -> Col8
 _altColor ~(r, g, b)
-  | 1063 * fromEnum r + 3576 * fromEnum g + 361 * fromEnum b <= 200000 = (255, 255, 255)
+  | 299 * fromEnum r + 587 * fromEnum g + 114 * fromEnum b <= (128000 :: Int) = (255, 255, 255)
   | otherwise = (0, 0, 0)
 
 -- | Convert a given 'Hashable' object to a 'Colour' by determining the hash, and using the last 24 bits as source for the red, green, and blue channels of the 'Colour' to construct.