Nuala steps back from a freshly painted red buoy, paintbrush dripping, and tilts her head with a satisfied grin. "Red means keep it to your right. Everyone knows that. But there is a shade I never use on a buoy. I keep it for myself. Guess which, and I will show you." The paint is still wet and the tide is coming in. Grab the tin, hold the brush steady and tell me what colour you are in tonight.