What is the difference between Loctite threadlocker colors?

Thread-locker - Let's use this stuff - bucky rides

How to choose the right LOCTITE® threadlocker

LOCTITE, 2047, Black, High-Lubricity and Strength Threadlocker - 19L452

Loctite Blue High Strength Thread Locking Adhesive Threadlocker 6642 Replacement 5ml - China Threadlocker, High Strength 6642

Loctite Threadlocker, LOCTITE 222MS, Purple, Low Strength, Liquid, 250 mL Bottle 135335

Gorilla Glue Takes on Loctite with New Threadlocker Compounds

LOCTITE 22241 - Low Strength Anaerobic Thread Locker

What is the difference between Loctite threadlocker colors?

The Ultimate Guide to Choosing the Right Threadlocker: Red vs Blue