Hey all.
To those using Minecraft 1.8.8 and 1.12.2, you can now specify item data values in the /invgive, /endergive, /invclear and /enderclear commands.
For example, to give the player Jannyboy11 10 red wool blocks, and then remove 5, use:
Code (Text):
/endergive Jannyboy11 wool:14 10
/enderclear Jannyboy11 wool:14 5
Cheers!