Looks like there is a lot of projector light bouncing off your walls and ceiling.
Silver or grey projector screen white ceailing light grey walls.
But it comes at the expense of some image brightness.
In so doing the black level on the screen is maintained.
Most projectors are calibrated to white screen materials.
After moving my projector from the basement to an upstairs room i was really surprised how much light reflecting off walls lowered the picture quality on a white screen.
A grey screen will help combat this.
The other style is a light gray color and is a newer innovation in projector technology first appearing only in the early 2000s.
Projectors now days delivery high lumens and amazing contrast levels.
A grey screen such as the elite cinegrey 3d screen shown here can help boost contrast and perceived black level when there are concerns with room light a reflective white ceiling or walls or a projector s inherent contrast.
The image on a white colored projector screen will have great color reproduction and vibrance but will not display blacks very well.
Are you missing the picture.
This works because assuming the projector has ample lumen output as most digital projectors do whites remain satisfyingly white while blacks are maintained at a deeper black.
On the other hand a gray projector screen will display blacks very well and have a better contrast ratio but the colors and vibrance of the image will be on the lesser side.
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Reputable projector companies calibrate their projectors to a white screen right out of the factory.
They are often called high contrast screens because they can help to improve the depth of blacks while still allowing bright and colorful parts of the image to shine.
Matte white 1 1 gain.
I would not use the silver screen because you will get hot spotting.