Information

Minecraft version: 1.21
Modloader: Fabric
Fabric loader version: 0.15.11
Environment: Singleplayer

Mod name: Just Mob Heads
Mod version: 8.1

Description: Slime head collected upon killing Slime is stark white. Same for Slime Heads given by command.

See also #2466 (comment).

Here's the slime head data in case anyone needs it

Weirdly enough the only people on my server having issues are the two people with Fresh Animations, no idea if that correlates with anything but it's worth mentioning

Thank you for opening the issue and giving the mod a try! This has been fixed in version 8.2 of Just Mob Heads.

https://curseforge.com/minecraft/mc-mods/just-mob-heads/files