Blue tint around edges of screen increasing towards the middle

hello.

recently replaced the light bulb for the first time. (on its second light bulb)

The projector works fine, still projects the movies/shows well. only problem is that a blue tint ora appeared around the corners of the screen. the more Ive used it, the more the blue tint travels closer to the middle.

is this fixable? or slowly burning over time and need to get a new one?