Blur

Blur is a simple mod that will add a blur to the GUI backgrounds in your game. The vanilla GUI backgrounds are just regular game visuals with a dark overlay on top. Many players find this distracting and unsettling. The Blur mod blurs out the backgrounds behind a GUI. The blur is aesthetic and visually pleasing. Even the death screen that appears after a player dies, has been blurred. Earlier there used to be just a red overlay. The blur strength can be adjusted in the mod configs. Although, I personally think that the default blur value looks the best.
Take a look at the screenshots to see what you can expect from this pack. This is a Forge mod and download links are given below.

Download
for Minecraft 1.16.5
Download (358kb)for Minecraft 1.15.1
Download (358kb)for Minecraft 1.14.4
Download (358kb)for Minecraft 1.12.2
Download (16kb)for Minecraft 1.12
Download (16kb)for Minecraft 1.10.2
Download (16kb)for Minecraft 1.9.4
Download (16kb)Additional links
You can find more detailed explanation in following links:
https://www.curseforge.com/minecraft/mc-mods/blur
Comment
Thank you!