diff --git a/cpdfcolours.ml b/cpdfcolours.ml
index 6e490e6..bccd9ef 100644
--- a/cpdfcolours.ml
+++ b/cpdfcolours.ml
@@ -3,7 +3,7 @@ open Pdfutil
 
 let colours =
   map
-    (fun (a, b) -> (b, a)) 
+    (fun (a, b) -> (String.lowercase_ascii b, a)) 
     [(0xF0F8FF, "AliceBlue");
      (0xFAEBD7, "AntiqueWhite");
      (0x00FFFF, "Aqua");
diff --git a/cpdfcommand.ml b/cpdfcommand.ml
index af0a482..3e4c628 100644
--- a/cpdfcommand.ml
+++ b/cpdfcommand.ml
@@ -1140,13 +1140,13 @@ let setaddtext s =
   setop (AddText s) ()
 
 let parse_color s =
-  match String.lowercase_ascii s with
-  | "white" -> Cpdfaddtext.RGB (1., 1., 1.)
-  | "black" -> Cpdfaddtext.RGB (0., 0., 0.)
-  | "red" -> Cpdfaddtext.RGB (1., 0., 0.)
-  | "green" -> Cpdfaddtext.RGB (0., 1., 0.)
-  | "blue" -> Cpdfaddtext.RGB (0., 0., 1.)
-  | _ ->
+  match lookup (String.lowercase_ascii s) Cpdfcolours.colours with
+  | Some c ->
+      let r = float_of_int ((c land 0xFF0000) lsr 16) /. 255. in
+      let g = float_of_int ((c land 0x00FF00) lsr 8) /. 255. in
+      let b = float_of_int (c land 0x0000FF) /. 255. in
+        Cpdfaddtext.RGB (r, g, b)
+  | None ->
       let getnum = function
         | Pdfgenlex.LexInt i -> float i
         | Pdfgenlex.LexReal f -> f
@@ -1154,7 +1154,7 @@ let parse_color s =
       in
         match Pdfgenlex.lex_string s with
         | [g] -> Cpdfaddtext.Grey (getnum g)
-        | [r;g;b] -> Cpdfaddtext.RGB (getnum r, getnum g, getnum b)
+        | [r; g; b] -> Cpdfaddtext.RGB (getnum r, getnum g, getnum b)
         | [c; y; m; k] -> Cpdfaddtext.CYMK (getnum c, getnum y, getnum m, getnum k)
         | _ -> error "Bad color"