Since the other challenge I put forth has been rejected, I now offer you all the Darkness Challenge. This uses dark colors and low saturation to provide an air of mustinold and strangelity.
Only use pixel art, so no using brushes to blend colors.
You must complete the entire terrain.png. Nothing else is required.
The deadline is August 24th.
On that date, a poll will be held. Your submission to the poll will require the terrein, and exactly three screenshots showing off the pack.
Wow, great textures, everyone!
You may add 2 (two) colors to the challenge, but you must use them in at least 8 (eight) blocks each. (Not necessarily together.) They also must be under Saturation 17.
Good luck choosing. >: ]
EDIT: for wool, try and shade using different combinations of colors, to give the illusion of different colors.