Minecraft's World of Color update (aka Minecraft Java Edition 1.12) is focused on revamping the game's visuals. New colored blocks have been added like concrete and glazed terracotta, as well as an updated color palette of most colored blocks, so they're more vibrant. There are other improvements which you can read about in our downloads section.
As usual Minecraft for PC has received updates first, along with bug fixes, some new features include rocket-propelled elytra flight, iron nuggets, and Sweeping Edge enchantment for swords. The attack indicator has also been changed to hint when you should attack. Yesterday, Minecraft also made it to Apple TV. For download links and complete release notes head here.