diff --git a/.github/workflows/build-ci.yml b/.github/workflows/build-ci.yml
index d515a09..95e58aa 100644
--- a/.github/workflows/build-ci.yml
+++ b/.github/workflows/build-ci.yml
@@ -5,7 +5,7 @@ jobs:
   linux1:
     strategy:
       matrix:
-        resolver: [lts-12, lts-13, lts-14, lts-15, lts-16, lts-17, lts-18, lts-19, lts-20, lts-21, lts-22, lts-23]
+        resolver: [lts-12, lts-13, lts-14, lts-15, lts-16, lts-17, lts-18, lts-19, lts-20, lts-21, lts-22, lts-23, lts-24]
     name: Build the Haskell software
     runs-on: ubuntu-latest
     steps:
@@ -22,7 +22,7 @@ jobs:
   linux2:
     strategy:
       matrix:
-        resolver: [lts-12, lts-13, lts-14, lts-15, lts-16, lts-17, lts-18, lts-19, lts-20, lts-21, lts-22, lts-23]
+        resolver: [lts-12, lts-13, lts-14, lts-15, lts-16, lts-17, lts-18, lts-19, lts-20, lts-21, lts-22, lts-23, lts-24]
     name: Build the Haddock documentation
     runs-on: ubuntu-latest
     steps:
@@ -78,7 +78,7 @@ jobs:
   linux6:
     strategy:
       matrix:
-        resolver: [lts-12, lts-13, lts-14, lts-15, lts-16, lts-17, lts-18, lts-19, lts-20, lts-21, lts-22, lts-23]
+        resolver: [lts-12, lts-13, lts-14, lts-15, lts-16, lts-17, lts-18, lts-19, lts-20, lts-21, lts-22, lts-23, lts-24]
     name: Run the tests
     runs-on: ubuntu-latest
     steps:
diff --git a/src/Data/Hashable/Color.hs b/src/Data/Hashable/Color.hs
index 0ca68fa..39a32ee 100644
--- a/src/Data/Hashable/Color.hs
+++ b/src/Data/Hashable/Color.hs
@@ -55,7 +55,7 @@ _ansiSeqFg = _ansiSeq 38
 
 _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.