Forge version: forge-1.16.1-32.0.69
Rats version: rats-6.0.4-1.16.1
SSP/SMP: SMP

Description: The Synesthesia buff is much darker than it was in older updates making it hard to see when underground, and it also bleaches out the hotbar making it harder to tell what item is selected.

Steps to replicate: Eat "Confit Byaldi", observe hotbar and observe visibility while underground.

Mods:
AppleSkin-mc1.16.1-forge-1.0.14
citadel-1.2.0
cloth-config-forge-4.0.1
Controlling-7.0.0.2
CTM-MC1.16.1-1.1.0.1
Ding-1.16.1-1.1.0
FastLeafDecay-v23
ironchest-1.16.1-11.0.1
ironshulkerboxes-1.16.1-5.0.1
jei-1.16.1-7.0.0.6
light-overlay-5.4.1
Mekanism-1.16.1-10.0.2.425
MekanismAdditions-1.16.1-10.0.2.425
MekanismGenerators-1.16.1-10.0.2.425
MekanismTools-1.16.1-10.0.2.425
MouseTweaks-2.13-mc1.16.1
rats-6.0.4-1.16.1
refinedstorage-1.9.2
StorageDrawers-1.16.1-8.0.0
valhelsia_structures-16.0.1
Waystones_1.16.1-7.0.2

Edit: The darkness effect is easier to see if you try it in the nether. It's SUPER dark.

Fixed in 5e55839

you cannot see at all in the end, atm6 at the end