diff --git a/app/Main.hs b/app/Main.hs
--- a/app/Main.hs
+++ b/app/Main.hs
@@ -39,6 +39,7 @@
                                    lineSpacingVariance = Just 0.2,
                                    wordSpacingVariance = Just 0.4,
                                    width               = Just 800,
+                                   color               = Just (0,0,0),
                                    randomSeed          = Randomize}
   imageByteString <- renderImage creds params "Hello World!"
 
diff --git a/handwriting.cabal b/handwriting.cabal
--- a/handwriting.cabal
+++ b/handwriting.cabal
@@ -1,5 +1,5 @@
 name:                handwriting
-version:             0.1.0.2
+version:             0.1.0.3
 synopsis:            API Client for the handwriting.io API.
 description:         Please see README.md
 homepage:            http://github.com/ismailmustafa/handwriting-haskell#readme
diff --git a/src/Network/Internal/Utilities.hs b/src/Network/Internal/Utilities.hs
--- a/src/Network/Internal/Utilities.hs
+++ b/src/Network/Internal/Utilities.hs
@@ -75,8 +75,10 @@
 {-| Convert RGB to Hex.
 -}
 toHex :: Color -> String
-toHex (r,g,b) = "&handwriting_color=" <> showHex r "" <> showHex g "" 
-                                      <> showHex b ""
+toHex (r,g,b) = "&handwriting_color=" <> pad (showHex r "")
+                                      <> pad (showHex g "")
+                                      <> pad (showHex b "")
+  where pad s | length s == 1 = "0" <> s | otherwise = s
 
 {-| Limit double values to 3 significant figures.
 -}