What color jacket does Happy Gilmore win?

The correct answer isGold.
The colour of jacket Happy Gilmore won was Gold. In the movie (Happy Gilmore), remember Chubby telling Happy that he could win a gold or green jacket, and Happy response was “Gold jacket, green jacket, who gives a shit?” This dialogue took place earlier in the movie in reference to the four major tournaments of the PGA tour.

In the Masters (tour championship) the winner takes the Gold jacket and in the Open championship the winner gets a green jacket. Happy won the tour championship therefore, he got the gold jacket.