Sheep look completely different in modern versions compared to beta: Fixed

While bed items match the old wool colors, the beds themselves do not: Fixed

Banners also look different after 1.12's color palette change:

Shulker colors are different as well: Fixed

Wolf collar colors were changed. This can most easily be seen with the orange and yellow collars:

Pre-1.12:

Post-1.12:

Lastly, dyed leather armor is different:

Pre-1.12:

Post-1.12:

#27 in addition to this

I cannot fix these as they are hardcoded. I believe OptiFine supports this, but I will not be fixing it with that. If Colormatic supports it, I'll look into it.