diff --git a/colour.cpp b/colour.cpp
index ffe0525b..ae0e7c4e 100644
--- a/colour.cpp
+++ b/colour.cpp
@@ -29,6 +29,10 @@ using namespace util;
 const util::colour util::colour::WHITE ({ 1.0, 1.0, 1.0, 1.0 });
 const util::colour util::colour::BLACK ({ 0.0, 0.0, 0.0, 1.0 });
 
+const util::colour util::colour::RED   ({ 1.0, 0.0, 0.0, 1.0 });
+const util::colour util::colour::GREEN ({ 0.0, 1.0, 0.0, 1.0 });
+const util::colour util::colour::BLUE  ({ 0.0, 0.0, 1.0, 1.0 });
+
 
 //-----------------------------------------------------------------------------
 const json::node&
diff --git a/colour.hpp b/colour.hpp
index 36736c6c..04df62e5 100644
--- a/colour.hpp
+++ b/colour.hpp
@@ -34,6 +34,9 @@ namespace util {
 
         static const colour WHITE;
         static const colour BLACK;
+        static const colour RED;
+        static const colour BLUE;
+        static const colour GREEN;
     };
 
     template <> colour& randomise (colour&);