diff --git a/Data/Graph/Internal/Color.hs b/Data/Graph/Internal/Color.hs
new file mode 100644
--- /dev/null
+++ b/Data/Graph/Internal/Color.hs
@@ -0,0 +1,3 @@
+module Data.Graph.Internal.Color where
+
+data Color = White | Grey | Black deriving (Eq,Ord,Show,Read)
diff --git a/graphs.cabal b/graphs.cabal
--- a/graphs.cabal
+++ b/graphs.cabal
@@ -1,6 +1,6 @@
 name:          graphs
 category:      Data Structures
-version:       0.2
+version:       0.3
 license:       BSD3
 cabal-version: >= 1.6
 license-file:  LICENSE
@@ -39,7 +39,7 @@
     Data.Graph.Class.VertexEnumerable
     Data.Graph.Dual
     Data.Graph.PropertyMap
-  other-modules
+  other-modules:
     Data.Graph.Internal.Color
 
   ghc-options: -Wall