Overview
MY WORKING FIX 2020:(Im using MMod+Half life Update) But it should work with anyone who has this problem.1) If u have HDR disabled, enable it on FULL HDR, Apply and then restart your game.2) In console use: mat_bloom_scalefactor_scalar 0.30 (Default is on 1) i played with the settings from 0.00 to 1 and after testing a lot, i found my sweet spot on 0.30 but you can adjust those number as you want to adjust the bloom at ur own taste.3)For confort (and dont have to put the command every time you launch the game),On the shortcut ure using to launch the game put this in the steam launch options: +mat_bloom_scalefactor_scalar 0.30It solve the problem of saturated ligthing, using HDR FULL and with out disabling some cool bloom efects. :possession:Hope it works for you.
Fix
mat_bloom_scalefactor_scalar 0.30