diff --git a/colour.hpp b/colour.hpp
index 54ba96f2..819b6e78 100644
--- a/colour.hpp
+++ b/colour.hpp
@@ -78,6 +78,7 @@ namespace cruft {
     using srgba1  = srgba<1,T>;
     using srgba1f = srgba1<float>;
 
+    using srgba2f = srgba<2,float>;
     using srgba3f = srgba<3,float>;
     using srgba4f = srgba<4,float>;