the grayscale on most potions doesn't work

Put the summary of the bug you're having here

What I expected to happen was colored potions

What actually happened was blue potions

Steps to Find Bug
1. get a potion

p.s. potions that do work are: jump boost II, Speed II, Poison II, Healing II, Regeneration II, Strength II and Instant Damage II

p.p.s. same with potion arrows

p.p.p.s splash potions too