I replaced my line earlier this year but did not remember what color it was. Went out tonite and checked and it is Merc grey with blue writing on it. The shop owner I got it from said it was ethanol resistant so I took his word for it, he has done work for me and is pretty good so I trusted him.
Interesting thing was I checked a Walmart and Kmart to see what they had and the line they had was not OEM stuff and was more expensive than the hose assembly I got from the boat shop.
SeaRay