How to turn off this graphic effect on The Outer Worlds?

None of the posted images look off when compared to any and all released footage of the gameplay in online videos (both official trailers and let's plays).

I'm discounting the first image as the scopes specifically add an additional filter to the graphics, while also blowing up the resolution of the assets in view (and TOW does not improve texture quality when zooming in).

The Outer Worlds does not have the best textures ever seen (e.g. the glove in your third picture, various cases of pop-in), and the general graphic design leans towards the saturated/bright/blocky as opposed to hyperrealistic colors.
There is a generally yellow filter overlaid - at least in most outdoor places such as Monarch where your screenshots were taken.

Overall, I don't see an issue here. It seems like you simply don't like the general aesthetic that TOW has intentionally gone for.