What is “blue” Loctite?

Permatex® Medium Strength Threadlocker Blue Gel, 5 G – Permatex

Loctite Threadlocker 242 Blue Removable Nut and Bolt Adhesive 0.20 oz. (each) 209728 - The Home Depot

Blue Stick Knife Thread Locker - Loctite – Knafs

Some kind of sick joke? : r/Tools

Blue Stick Knife Thread Locker - Loctite – Knafs

Loctite - 242 Mil Spec Medium Strength Blue Threadlocker - 10 mL – Pilots HQ LLC.

Lock It In- Permatex Threadlocker Blue All-purpose Formula Locks And Seals Bolts To Prevent Parts From Loosening Due To Vibration And Protects Threads

Permatex 24200 Medium Strength Threadlocker Blue, 6 ml

Red vs Blue Loctite

Loctite® 242® Blue Threadlocker, 24231

24221: Henkel Loctite® 242 Threadlocker Sealant Blue, 10 mL bottle