I used GLOSS SEA BLUE FS 15042 from Mission Models. Not being an expert I can't say how accurate it is, but I do love using their paints, and the result is in my eyes luverly.
I sanded and scraped down the mating areas of part J3 and J4, and a little off the edges of J5, and snipped a millimeter or so off the tabs. Worked well, a bit snug but it works.