Minecraft wiki entry for World_of_Color_Update, associated text: New colored blocks:
Concrete and concrete powder.
Glazed terracotta.
Beds are now dyeable.
Parrots in multiple colors.
Recipe book and knowledge book.
Functions.
Several commands.
Narrator – says what is typed in chat out loud (Ctrl+B to turn on).
New sounds.
Your hotbar can now be saved and loaded in Creative mode (C+number to save and X+number to load).
New illusioner that only can be accessible by commands.