Colour
Gandalf,
I had my medical for the same on 15 January, don't worry about it.
If you're colour blind you get a limitation on your licence which limits you to "VFR within the state" - in other words, you can only fly in daylight in Ireland.
You can get this lifted if you pass an alternative test called an "airport lights test" (you'll see this referred to on the form for the medical). I've asked here what exactly this test is, but no luck with a response. I'd like to know a little bit about it before approaching the IAA.
Do post how you get on.