This is how the Eeyore costumes have changed over the years.
1966-1969: Eeyore (pictured with Pooh) is more of a beige color, has short ears and has cyan outlining on his eyes.
1969-1997: Eeyore becomes gloomier and is more grey; plus his muzzle, belly and hooves become brighter. He sometimes has cyan outlining on his eyes and sometimes has a tongue.
1995-present: Eeyore becomes happier and his ears become longer and flatter. He now has no tongue.
version of Eeyore, seen in live stage shows.