What does this mod do?
It neutralises the intensity of all the base imagespace parameters by a certain amount. Less oversaturation, contrast, and tinting - how much, is your choice. You can also generate your own file with the attached script. (Thanks, JawZ!)

How does this mod work?
The included ESP files will overwrite all the imagespace parameters contained in the base game, DLC, and SE update file with ones scaled down to a neutral value using a SSEEdit script.

How do I install it?
Extract to your Data directory and activate only one ESP in your mod manager. I mean, there's no harm in activating several, probably, but they'll overwrite each other.

If you use weather mods, you should probably load this before them. Otherwise, portions of the weather mod may be overwritten with the scaled values.

Notes
If you're using ReShade, this will allow you to get rid of that insane contrast boost and do your own colour grading.
The parameters are tied together - in that an imagespace with high contrast may have low brightness to compensate or a high tint value. In place of making a complicated script to equalize the brightness values and modify the other values accordingly, the files offered tweak all parameters at once.