Hi Ben
Sorry to hear about the colour blindness, but am impressed with your perseverance in the face of it.
I just completed my skills test a couple of weeks ago and it was'nt as bad as I thought it may be. Actually, in comparison to the mock that my instructor put me through the day before, it was a lot easier. As my examiner said to me - "we all make mistakes, but as long as you keep the aeroplane in control, then there will be no problem."
I don't think I've ever sweated so much as I did that afternoon.
Good luck and safe flying from Oz